Add docs for explorer workspace tags [TF-30537]

Author: KenCox-Hashicorp

content/terraform-docs-common/docs/cloud-docs/api-docs/explorer.mdx

@@ -126,6 +126,7 @@ fields available for each view type are detailed below:
 | `resources_drifted`               | `number`   | The count of resources that drift was detected for. |
 | `resources_undrifted`             | `number`   | The count of resources that drift was not detected for. |
 | `state_version_terraform_version` | `string`   | The Terraform version used to create the current run's state file. |
+| `tags`                            | `string`   | A comma separated list of tags (keys and key:value pairs) applied to this workspace. |
 | `vcs_repo_identifier`             | `string`   | The name of the repository configured for this workspace, if available. |
 | `workspace_created_at`            | `datetime` | The time this workspace was created. |
 | `workspace_name`                  | `string`   | The name of this workspace. |
@@ -265,7 +266,15 @@ _Show data for all workspaces with `test` in their name_
 ```shell
 curl \
   --header "Authorization: Bearer $TOKEN" \
-  'https://app.terraform.io/api/v2/organizations/$ORG_NAME/explorer?type=workspaces&&filter%5B0%5D%5Bworkspace_name%5D%5Bcontains%5D%5B0%5D=test'
+  'https://app.terraform.io/api/v2/organizations/$ORG_NAME/explorer?type=workspaces&filter%5B0%5D%5Bworkspace_name%5D%5Bcontains%5D%5B0%5D=test'
+```
+
+_Show data for all workspaces with the tag key `billing` having value `tier2`_
+
+```shell
+curl \
+  --header "Authorization: Bearer $TOKEN" \
+  'https://app.terraform.io/api/v2/organizations/$ORG_NAME/explorer?type=workspaces&filter%5B0%5D%5Btags%5D%5Bcontains%5D%5B0%5D=billing:tier2'
 ```
 
 **View Type: `modules`**
@@ -352,6 +361,7 @@ _Show data for all workspaces_
         "resources-drifted": 0,
         "resources-undrifted": 0,
         "state-version-terraform-version": "1.5.7",
+        "tags": "",
         "vcs-repo-identifier": null,
         "workspace-created-at": "2023-10-17T21:56:45.570+00:00",
         "workspace-name": "payments-service",
@@ -384,6 +394,7 @@ _Show data for all workspaces_
         "resources-drifted": 3,
         "resources-undrifted": 3,
         "state-version-terraform-version": "1.4.5",
+        "tags": "billing:tier1, project_customer",
         "vcs-repo-identifier": "acmecorp/api",
         "workspace-created-at": "2023-04-25T17:09:14.960+00:00",
         "workspace-name": "api-service",