Add atlan to marketplace

.claude-plugin/marketplace.json

@@ -1040,14 +1040,14 @@
       "homepage": "https://github.com/intercom/claude-plugin-external"
     },
     {
-      "name": "followrabbit",
-      "description": "Cloud cost optimization for GCP infrastructure. Review changes for cost impact and auto-apply savings recommendations using the followrabbit CLI.",
+      "name": "atlan",
+      "description": "Atlan data catalog plugin for Claude Code. Search, explore, govern, and manage your data assets through natural language. Powered by the Atlan MCP server with semantic search, lineage traversal, glossary management, data quality rules, and more.",
       "source": {
         "source": "url",
-        "url": "https://github.com/followrabbit-ai/awesome-rabbit.git",
-        "sha": "f59ec3d1f6337a6ed825ef06836a221ed3d2ffb0"
+        "url": "https://github.com/atlanhq/agent-toolkit.git",
+        "sha": "acdf284da6aa98b14f8dad90a9827006d8df425c"
       },
-      "homepage": "https://subscriptions.agentic.followrabbit.ai/"
+      "homepage": "https://docs.atlan.com/"
     }
   ]
 }