chore(V2): scheletro src/cerbero_mcp + tests/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/cerbero_mcp/__main__.py

@@ -0,0 +1,10 @@
+"""Entrypoint cerbero-mcp."""
+from __future__ import annotations
+
+
+def main() -> None:
+    raise NotImplementedError("server da implementare nelle phase successive")
+
+
+if __name__ == "__main__":
+    main()