chore: add AI tool configs and fix server.py indentation

.gemini/hooks/crg-session-start.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# code-review-graph: session start status (Gemini CLI hook)
+# Must output ONLY JSON on stdout. Logs go to stderr. Never blocks the session.
+set -euo pipefail
+
+cat > /dev/null || true
+
+msg="$(code-review-graph status --repo "/home/v6ole/PythonProject/NetBrain_MCP" 2>&1 | head -n 1 || true)"
+
+CRG_MSG="$msg" python3 -c '
+import json,os
+m=os.environ.get("CRG_MSG","")
+print(json.dumps({"systemMessage":m,"suppressOutput":True}))
+' 2>/dev/null || echo '{"suppressOutput": true}'
+exit 0