Internalize Hub CLI functionality into tkn

Remove external dependency on github.com/tektoncd/hub and integrate
the Hub CLI commands directly into the tektoncd/cli codebase. This
eliminates the need for the openshift-pipelines/hub fork replacement
and simplifies the dependency management.

BREAKING CHANGE: Hub commands now default to --type=artifact instead
of --type=tekton. Users relying on Tekton Hub resources must now
explicitly specify --type=tekton when using hub search, get, or
install commands.

Signed-off-by: divyansh42 <diagrawa@redhat.com>
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: divyansh42

docs/cmd/tkn.md

@@ -25,7 +25,7 @@ CLI for tekton pipelines
 * [tkn completion](tkn_completion.md)	 - Prints shell completion scripts
 * [tkn customrun](tkn_customrun.md)	 - Manage CustomRuns
 * [tkn eventlistener](tkn_eventlistener.md)	 - Manage EventListeners
-* [tkn hub](tkn_hub.md)	 - Interact with tekton hub
+* [tkn hub](tkn_hub.md)	 - Interact with artifacthub
 * [tkn pipeline](tkn_pipeline.md)	 - Manage pipelines
 * [tkn pipelinerun](tkn_pipelinerun.md)	 - Manage PipelineRuns
 * [tkn task](tkn_task.md)	 - Manage Tasks

docs/cmd/tkn_hub.md

@@ -1,6 +1,6 @@
 ## tkn hub
 
-Interact with tekton hub
+Interact with artifacthub
 
 ### Usage
 
@@ -10,26 +10,38 @@ tkn hub
 
 ### Synopsis
 
-Interact with tekton hub
+Interact with artifacthub
+
+Deprecation Notice: Tekton Hub support in CLI is being deprecated in favor of Artifact Hub.
+The following commands currently only work with Tekton Hub and may support Artifact Hub in a future release:
+  - check-upgrade
+  - downgrade
+  - get
+  - info
+  - reinstall
+  - search
+  - upgrade
+
+Action Required: Users should migrate to Artifact Hub by using the '--type artifact' flag
+with the install command. For example:
+    tkn hub install task foo --type artifact --from tekton-catalog-tasks
+
+When using '--type tekton', a deprecation warning will now be displayed.
+Artifact Hub (https://artifacthub.io) will become the only supported hub in future releases.
 
 ### Options
 
 ```
-      --api-server string   Hub API Server URL (default 'https://api.hub.tekton.dev' for 'tekton' type; default 'https://artifacthub.io' for 'artifact' type).
-                            URL can also be defined in a file '$HOME/.tekton/hub-config' with a variable 'TEKTON_HUB_API_SERVER'/'ARTIFACT_HUB_API_SERVER'.
+      --api-server string   Hub API Server URL.
+                            For artifact type: default 'https://artifacthub.io' (env: ARTIFACT_HUB_API_SERVER)
+                            For tekton type (DEPRECATED): default 'https://api.hub.tekton.dev' (env: TEKTON_HUB_API_SERVER)
+                            Can also be set in '$HOME/.tekton/hub-config'.
   -h, --help                help for hub
-      --type string         The type of Hub from where to pull the resource. Either 'artifact' or 'tekton' (default "tekton")
+      --type string         The type of Hub from where to pull the resource. Either 'artifact' or 'tekton' (DEPRECATED: tekton type will be removed in a future release) (default "artifact")
 ```
 
 ### SEE ALSO
 
 * [tkn](tkn.md)	 - CLI for tekton pipelines
-* [tkn hub check-upgrade](tkn_hub_check-upgrade.md)	 - Check for upgrades of resources if present
-* [tkn hub downgrade](tkn_hub_downgrade.md)	 - Downgrade an installed resource
-* [tkn hub get](tkn_hub_get.md)	 - Get resource manifest by its name, kind, catalog, and version
-* [tkn hub info](tkn_hub_info.md)	 - Display info of resource by its name, kind, catalog, and version
 * [tkn hub install](tkn_hub_install.md)	 - Install a resource from a catalog by its kind, name and version
-* [tkn hub reinstall](tkn_hub_reinstall.md)	 - Reinstall a resource by its kind and name
-* [tkn hub search](tkn_hub_search.md)	 - Search resource by a combination of name, kind, categories, platforms, and tags
-* [tkn hub upgrade](tkn_hub_upgrade.md)	 - Upgrade an installed resource
 

docs/cmd/tkn_hub_check-upgrade.md

@@ -31,6 +31,6 @@ Check for upgrades of resources if present
 
 ### SEE ALSO
 
-* [tkn hub](tkn_hub.md)	 - Interact with tekton hub
+* [tkn hub](tkn_hub.md)	 - Interact with artifacthub
 * [tkn hub check-upgrade task](tkn_hub_check-upgrade_task.md)	 - Check updates for Task installed via Hub CLI
 

docs/cmd/tkn_hub_downgrade.md

@@ -32,6 +32,6 @@ Downgrade an installed resource
 
 ### SEE ALSO
 
-* [tkn hub](tkn_hub.md)	 - Interact with tekton hub
+* [tkn hub](tkn_hub.md)	 - Interact with artifacthub
 * [tkn hub downgrade task](tkn_hub_downgrade_task.md)	 - Downgrade an installed Task by its name to a lower version
 

docs/cmd/tkn_hub_get.md

@@ -30,7 +30,7 @@ Get resource manifest by its name, kind, catalog, and version
 
 ### SEE ALSO
 
-* [tkn hub](tkn_hub.md)	 - Interact with tekton hub
+* [tkn hub](tkn_hub.md)	 - Interact with artifacthub
 * [tkn hub get pipeline](tkn_hub_get_pipeline.md)	 - Get Pipeline by name, catalog and version
 * [tkn hub get task](tkn_hub_get_task.md)	 - Get Task by name, catalog and version
 

docs/cmd/tkn_hub_info.md

@@ -30,6 +30,6 @@ Display info of resource by its name, kind, catalog, and version
 
 ### SEE ALSO
 
-* [tkn hub](tkn_hub.md)	 - Interact with tekton hub
+* [tkn hub](tkn_hub.md)	 - Interact with artifacthub
 * [tkn hub info task](tkn_hub_info_task.md)	 - Display info of Task by its name, catalog and version
 

docs/cmd/tkn_hub_install.md

@@ -26,13 +26,15 @@ Install a resource from a catalog by its kind, name and version
 ### Options inherited from parent commands
 
 ```
-      --api-server string   Hub API Server URL (default 'https://api.hub.tekton.dev' for 'tekton' type; default 'https://artifacthub.io' for 'artifact' type).
-                            URL can also be defined in a file '$HOME/.tekton/hub-config' with a variable 'TEKTON_HUB_API_SERVER'/'ARTIFACT_HUB_API_SERVER'.
-      --type string         The type of Hub from where to pull the resource. Either 'artifact' or 'tekton' (default "tekton")
+      --api-server string   Hub API Server URL.
+                            For artifact type: default 'https://artifacthub.io' (env: ARTIFACT_HUB_API_SERVER)
+                            For tekton type (DEPRECATED): default 'https://api.hub.tekton.dev' (env: TEKTON_HUB_API_SERVER)
+                            Can also be set in '$HOME/.tekton/hub-config'.
+      --type string         The type of Hub from where to pull the resource. Either 'artifact' or 'tekton' (DEPRECATED: tekton type will be removed in a future release) (default "artifact")
 ```
 
 ### SEE ALSO
 
-* [tkn hub](tkn_hub.md)	 - Interact with tekton hub
+* [tkn hub](tkn_hub.md)	 - Interact with artifacthub
 * [tkn hub install task](tkn_hub_install_task.md)	 - Install Task from a catalog by its name and version
 

docs/cmd/tkn_hub_install_task.md

@@ -15,18 +15,18 @@ Install Task from a catalog by its name and version
 ### Examples
 
 
-Install a Task of name 'foo':
+Install a Task of name 'foo' from Artifact Hub:
 
-    tkn hub install task foo
+    tkn hub install task foo --type artifact --from tekton-catalog-tasks --version 0.3.0
 
 or
 
-Install a Task of name 'foo' of version '0.3' from Catalog 'Tekton':
+Install a Task of name 'foo' from Tekton Hub (DEPRECATED):
 
     tkn hub install task foo --version 0.3 --from tekton
 
-Note that the resources in Artifact Hub follow full SemVer - <major>.<minor>.<patch> (e.g. 0.3.0),
-please double check the version used
+Note: Tekton Hub is deprecated. Use '--type artifact' with Artifact Hub instead.
+Resources in Artifact Hub follow full SemVer - <major>.<minor>.<patch> (e.g. 0.3.0).
 
 
 ### Options
@@ -38,13 +38,15 @@ please double check the version used
 ### Options inherited from parent commands
 
 ```
-      --api-server string   Hub API Server URL (default 'https://api.hub.tekton.dev' for 'tekton' type; default 'https://artifacthub.io' for 'artifact' type).
-                            URL can also be defined in a file '$HOME/.tekton/hub-config' with a variable 'TEKTON_HUB_API_SERVER'/'ARTIFACT_HUB_API_SERVER'.
+      --api-server string   Hub API Server URL.
+                            For artifact type: default 'https://artifacthub.io' (env: ARTIFACT_HUB_API_SERVER)
+                            For tekton type (DEPRECATED): default 'https://api.hub.tekton.dev' (env: TEKTON_HUB_API_SERVER)
+                            Can also be set in '$HOME/.tekton/hub-config'.
   -c, --context string      Name of the kubeconfig context to use (default: kubectl config current-context)
       --from string         Name of Catalog to which resource belongs.
   -k, --kubeconfig string   Kubectl config file (default: $HOME/.kube/config)
   -n, --namespace string    Namespace to use (default: from $KUBECONFIG)
-      --type string         The type of Hub from where to pull the resource. Either 'artifact' or 'tekton' (default "tekton")
+      --type string         The type of Hub from where to pull the resource. Either 'artifact' or 'tekton' (DEPRECATED: tekton type will be removed in a future release) (default "artifact")
       --version string      Version of Resource
 ```
 

docs/cmd/tkn_hub_reinstall.md

@@ -33,6 +33,6 @@ Reinstall a resource by its kind and name
 
 ### SEE ALSO
 
-* [tkn hub](tkn_hub.md)	 - Interact with tekton hub
+* [tkn hub](tkn_hub.md)	 - Interact with artifacthub
 * [tkn hub reinstall task](tkn_hub_reinstall_task.md)	 - Reinstall a Task by its name
 

docs/cmd/tkn_hub_search.md

@@ -49,5 +49,5 @@ Search resources using tag 'cli':
 
 ### SEE ALSO
 
-* [tkn hub](tkn_hub.md)	 - Interact with tekton hub
+* [tkn hub](tkn_hub.md)	 - Interact with artifacthub