Adds gitlab rich integration to plus walkthrough

package.json

@@ -11120,6 +11120,13 @@
 						"when": "gitlens:plus:state > 2"
 					},
 					{
+						"id": "gitlens.plus.richIntegrations",
+						"title": "Rich Integrations for Self-Hosted Providers",
+						"media": {
+							"markdown": "walkthroughs/plus/rich-integrations.md"
+						}
+					},
+					{
 						"id": "gitlens.plus.visualFileHistory",
 						"title": "Visualize file history",
 						"description": "A more visual way to analyze and explore changes made to a file.\n\n[Open Visual File History view](command:gitlens.showTimelineView)",

walkthroughs/plus/rich-integrations.md

@@ -0,0 +1,15 @@
+## Rich Integrations for Self-Hosted Providers
+
+GitLens+ users with a paid plan can access rich integrations for self-hosted providers.
+
+### GitLab Self-Managed
+
+GitLab Self-Managed users can see GitLab avatars for commit authors, richer details for auto-linked issues and merge requests, as well as merge requests associated with commits and branches.
+
+<p align="center">
+  <img src="../../images/docs/hovers-gitlab-integration.png" alt="Commit Hover with GitLab Rich Integration"/>
+</p>
+
+### GitHub Enterprise
+
+A rich integration for GitHub Enterprise is coming soon.