🧑‍💻(mcp) add an mcp-inspector helper

Add a `yarn mcp-inspector` script that launches
`@modelcontextprotocol/inspector` against the local
docs-mcp server, with a checked-in config pre-filling
the URL and the `docs-mcp-client`
OAuth client and scopes so there is nothing to type
in by hand.

src/frontend/servers/mcp/mcp-inspector.config.json

@@ -0,0 +1,12 @@
+{
+  "mcpServers": {
+    "docs-mcp": {
+      "type": "http",
+      "url": "http://localhost:4455/mcp",
+      "oauth": {
+        "clientId": "docs-mcp-client",
+        "scopes": "openid docs:documents:search docs:documents:read docs:documents:create docs-mcp"
+      }
+    }
+  }
+}

src/frontend/servers/mcp/package.json

@@ -10,7 +10,8 @@
     "dev": "nodemon --config nodemon.json",
     "start": "node ./dist/start-server.js",
     "lint": "eslint",
-    "test": "vitest run"
+    "test": "vitest run",
+    "mcp-inspector": "npx @modelcontextprotocol/inspector --config mcp-inspector.config.json"
   },
   "engines": {
     "node": ">=22"