chore: add MCP server config (no PAT — stored in Keychain)

.mcp.json

@@ -0,0 +1,17 @@
+{
+  "mcpServers": {
+    "gitlab-mpm": {
+      "command": "uv",
+      "args": [
+        "run",
+        "--with", "mcp[cli]",
+        "--with", "httpx",
+        "--with", "keyring",
+        "${CLAUDE_PLUGIN_ROOT}/server/gitlab_mcp.py"
+      ],
+      "env": {
+        "GITLAB_API_URL": "https://gitlab.com/api/v4"
+      }
+    }
+  }
+}