Add blosc2.CTable to __setitem__ type annotation

Agent-Logs-Url: https://github.com/Blosc/python-blosc2/sessions/83225dd5-9d5c-4ca4-ba33-6ab4021b552f

Co-authored-by: FrancescAlted <314521+FrancescAlted@users.noreply.github.com>

Author: Copilot

src/blosc2/tree_store.py

@@ -382,7 +382,7 @@ def _validate_key(self, key: str) -> str:
         return key
 
     def __setitem__(
-        self, key: str, value: blosc2.Array | SChunk | blosc2.ObjectArray | blosc2.BatchArray
+        self, key: str, value: blosc2.Array | SChunk | blosc2.ObjectArray | blosc2.BatchArray | blosc2.CTable
     ) -> None:
         """Add a node with hierarchical key validation.