Add MCP configuration file (#4363)

.roo/mcp.json

@@ -0,0 +1,16 @@
+{
+  "mcpServers": {
+    "github": {
+      "command": "docker",
+      "args": [
+        "run",
+        "-i",
+        "--rm",
+        "-e",
+        "GITHUB_PERSONAL_ACCESS_TOKEN=${env:GITHUB_PERSONAL_ACCESS_TOKEN}",
+        "ghcr.io/github/github-mcp-server"
+      ],
+      "alwaysAllow": []
+    }
+  }
+}