chore: promote Install to top-level Antora module

Move all installation pages, partials, and examples from
administration-guide to a new modules/install/ module, matching the
downstream JTBD category structure. Create installation overview,
verification, and next-steps pages. Update all cross-module xrefs
and includes across admin-guide, overview, and end-user-guide.
Delete dissolved wrapper pages (preparing-the-installation,
permissions-to-install-che). Register discover, plan, and install
module navs in antora.yml.

Depends on: PR #3098 (Discover), PR #3099 (Plan)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gtrivedi88

antora.yml

@@ -8,6 +8,9 @@ nav:
   - modules/overview/nav.adoc
   - modules/hosted-che/nav.adoc
   - modules/end-user-guide/nav.adoc
+  - modules/discover/nav.adoc
+  - modules/plan/nav.adoc
+  - modules/install/nav.adoc
   - modules/administration-guide/nav.adoc
   - modules/extensions/nav.adoc
   - modules/glossary/nav.adoc

modules/administration-guide/examples/proc_che-configuring-ingresses.adoc

@@ -26,6 +26,6 @@ spec:
 
 .Additional resources
 
-* xref:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
+* xref:install:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
 
 * xref:using-the-cli-to-configure-the-checluster-custom-resource.adoc[]

modules/administration-guide/examples/snip_che-concealing-editors-additional-resources.adoc

@@ -2,7 +2,7 @@
 
 .Additional resources
 
-* xref:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
+* xref:install:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
 
 * xref:using-the-cli-to-configure-the-checluster-custom-resource.adoc[]
 

modules/administration-guide/examples/snip_che-supported-platforms.adoc

@@ -23,4 +23,4 @@ The following options are available for the local installation:
 
 .Additional resources
 
-* xref:installing-che.adoc[]
+* xref:install:installing-che.adoc[]

modules/administration-guide/nav.adoc

@@ -16,29 +16,9 @@
 *** xref:user-workspaces.adoc[]
 ** xref:calculating-che-resource-requirements.adoc[]
 * xref:running-at-scale.adoc[]
-// Install
-* xref:installing-che.adoc[]
-** Deploy on OpenShift
-*** xref:proc_installing-che-on-openshift-using-cli.adoc[]
-*** xref:proc_installing-che-on-openshift-using-the-web-console.adoc[]
-*** xref:proc_installing-che-on-openshift-with-keycloak-as-oidc.adoc[]
-** Deploy on {kubernetes}
-*** xref:installing-che-on-microsoft-azure.adoc[]
-*** xref:installing-che-on-amazon-elastic-kubernetes-service.adoc[]
-*** xref:proc_installing-che-on-the-virtual-kubernetes-cluster.adoc[]
-** Deploy locally
-*** xref:proc_installing-che-on-red-hat-openshift-local.adoc[]
-*** xref:proc_installing-che-on-minikube.adoc[]
-*** xref:proc_installing-che-on-minikube-keycloak-oidc.adoc[]
-** Deploy in a restricted environment
-*** xref:proc_installing-che-in-a-restricted-environment.adoc[]
-** xref:proc_finding-the-fully-qualified-domain-name-fqdn.adoc[]
-** xref:permissions-to-install-che.adoc[]
-*** xref:ref_permissions-to-install-che-on-openshift-using-cli.adoc[]
-*** xref:ref_permissions-to-install-che-on-openshift-using-the-web-console.adoc[]
 * xref:configuring-che.adoc[]
 ** xref:understanding-the-checluster-custom-resource.adoc[]
-*** xref:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
+*** xref:install:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
 *** xref:using-the-cli-to-configure-the-checluster-custom-resource.adoc[]
 *** xref:checluster-custom-resource-fields-reference.adoc[]
 ** xref:configuring-namespace-provisioning.adoc[]
@@ -137,4 +117,3 @@
 ** xref:upgrading-che-using-the-cli-management-tool.adoc[]
 ** xref:upgrading-che-using-the-cli-management-tool-in-restricted-environment.adoc[]
 ** xref:repairing-the-devworkspace-operator-on-openshift.adoc[]
-* xref:proc_uninstalling-che.adoc[]

modules/administration-guide/pages/che-operator.adoc

@@ -29,4 +29,4 @@ On a cluster with the {prod-short} operator, it is possible to create a `CheClus
 .Additional resources
 
 * xref:understanding-the-checluster-custom-resource.adoc[]
-* xref:installing-che.adoc[]
+* xref:install:installing-che.adoc[]

modules/administration-guide/pages/configuring-che-hostname.adoc

@@ -66,6 +66,6 @@ spec:
 
 .Additional resources
 
-* xref:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
+* xref:install:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
 
 * xref:using-the-cli-to-configure-the-checluster-custom-resource.adoc[]

modules/administration-guide/pages/configuring-che-with-self-signed-certificate.adoc

@@ -63,4 +63,4 @@ $ {orch-cli} label secret self-signed-certificate app.kubernetes.io/part-of=che.
 
 .Additional resources
 
-* xref:installing-che.adoc[]
+* xref:install:installing-che.adoc[]

modules/administration-guide/pages/configuring-storage-classes.adoc

@@ -30,7 +30,7 @@ Define a storage class name in the {prod-short} configuration to use the storage
 
 Use CheCluster Custom Resource definition to define storage classes:
 
-. Define storage class names: configure the `CheCluster` Custom Resource, and install {prod-short}. See xref:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[].
+. Define storage class names: configure the `CheCluster` Custom Resource, and install {prod-short}. See xref:install:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[].
 +
 [source,yaml,subs="+quotes,+attributes"]
 ----
@@ -51,6 +51,6 @@ spec:
 
 .Additional resources
 
-* xref:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
+* xref:install:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[]
 
 * xref:using-the-cli-to-configure-the-checluster-custom-resource.adoc[]

modules/administration-guide/pages/configuring-storage-sizes.adoc

@@ -35,7 +35,7 @@ per-workspace: 5Gi
 [NOTE]
 ====
 
-* You can set this field at installation. See xref:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[].
+* You can set this field at installation. See xref:install:using-chectl-to-configure-the-checluster-custom-resource-during-installation.adoc[].
 
 * You can update this field on the command line. See xref:using-the-cli-to-configure-the-checluster-custom-resource.adoc[].