add_cluster images added

Signed-off-by: Sourav Roy <souravroy@appscode.com>

Author: Sourav-Kumar-19

docs/platform/guides/cluster-management/add-cluster/create-vendor-managed.md

@@ -12,3 +12,7 @@ section_menu_id: guides
 
 
 # Create Vendor Managed Clusters
+
+![Create vendor-managed cluster form showing cluster name, region, machine type, and cluster profile selection](../images/add_cluster/create-cluster-form.png)
+
+![Creating cluster progress modal showing live status log](../images/add_cluster/create-cluster-progress.png)

docs/platform/guides/cluster-management/add-cluster/import-vendor-managed.md

@@ -23,12 +23,26 @@ section_menu_id: guides
 
 3. Choose a credential with permission to access and import the cluster, then click `Next`. To create one, use the `+Create Credential` button (see [Credentials](../../account-management/kubernetes/credentials.md)).
 
+![AWS credential form showing Access Key and Secret Key fields](../images/add_cluster/credential-aws.png)
+
+![DigitalOcean credential form showing Token field](../images/add_cluster/credential-digitalocean.png)
+
+![Azure credential form](../images/add_cluster/credential-azure.png)
+
+![GCP credential form showing Service Account JSON field](../images/add_cluster/credential-gcp.png)
+
+![Hetzner credential form showing SSH Key Name and Token fields](../images/add_cluster/credential-hetzner.png)
+
+![KubeVirt credential form showing Kubeconfig YAML field](../images/add_cluster/credential-kubevirt.png)
+
 ### Select Cluster
 
 4. Selection depends on the provider:
    - `Linode` / `Digital Ocean`: select the cluster directly.
    - `AKS` / `EKS` / `GKE`: choose the `Resource Group`, `Region`, or `Project`, then select the cluster.
 
+![EKS Select Cluster screen showing Region dropdown and cluster list table](../images/add_cluster/select-cluster-eks.png)
+
 ### Customize Features and Import
 
 5. Click `Import` to bring the cluster into the Platform Console, then explore it in the dashboard.