Update repo dev container config (#112)

Author: bendwyer

.devcontainer/devcontainer.json

@@ -29,7 +29,9 @@
   "features": {
     "ghcr.io/devcontainers/features/docker-in-docker:2": {},
     "ghcr.io/devcontainers/features/github-cli": {},
-    "ghcr.io/bendwyer/devcontainer-features/claude-code:4": {}
+    "ghcr.io/bendwyer/devcontainer-features/claude-code:4": {},
+    "ghcr.io/bendwyer/devcontainer-features/github-cli-extras:1": {},
+    "ghcr.io/bendwyer/devcontainer-features/github-mcp-server:1": {}
   },
   "remoteUser": "node",
   "updateContentCommand": "npm install -g @devcontainers/cli"