Enable chat MCP gallery feature

Added 'chat.mcp.gallery.enabled' set to true in settings.json to enable the gallery feature for chat MCP.

settings.json

@@ -51,6 +51,7 @@
   "chat.mcp.discovery.enabled": {
     "claude-desktop": true
   },
+  "chat.mcp.gallery.enabled": true,
   "chat.tools.global.autoApprove": true,
   "debug.onTaskErrors": "showErrors",
   "diffEditor.maxComputationTime": 0,