add tf.stack

Author: hoel-bagard

stubs/tensorflow/tensorflow/__init__.pyi

@@ -410,6 +410,7 @@ def split(
     num: int | None = None,
     name: str | None = "split",
 ) -> list[Tensor]: ...
+def stack(values: TensorCompatible, axis: int = 0, name: str | None = "stack") -> Tensor: ...
 def tensor_scatter_nd_update(
     tensor: TensorCompatible, indices: TensorCompatible, updates: TensorCompatible, name: str | None = None
 ) -> Tensor: ...