fix(py): py with build-in package typing not typing_extensions (#99)

python/zvec/common/constants.py

@@ -13,10 +13,9 @@
 # limitations under the License.
 from __future__ import annotations
 
-from typing import Optional, Union
+from typing import Optional, TypeVar, Union
 
 import numpy as np
-from typing_extensions import TypeVar
 
 # VectorType: DenseVectorType | SparseVectorType
 DenseVectorType = Union[list[float], list[int], np.ndarray]

python/zvec/extension/embedding_function.py

@@ -14,8 +14,7 @@
 from __future__ import annotations
 
 from abc import abstractmethod
-
-from typing_extensions import Protocol, runtime_checkable
+from typing import Protocol, runtime_checkable
 
 from ..common.constants import MD, DenseVectorType, SparseVectorType