chore: add typing core module

Author: LVivona

binding/python/py/synlink/typing.py

@@ -0,0 +1,42 @@
+from typing import NewType, Protocol, runtime_checkable
+
+from .utils import _check_minimum_version
+
+if _check_minimum_version(3, 11):
+    from typing import Self
+else:
+    from typing_extensions import Self
+
+__all__ = ["TProtocol"]
+
+
+@runtime_checkable
+class Serializable(Protocol):
+    """
+    Such protocol can be used to check if an object can be translated
+    and format into a bit repersentation
+
+    Example:
+    ```
+    from synlink.crypto import PrivateKey, PublicKey, create_new_key_pair
+
+    keypair : Keypair = create_new_key_pair()
+    assert not isinstance(keypair.seceret, Serializable), "seceret key should be able to serializable."
+    assert not isinstance(keypair.public, Serializable), "public key should be able to serializable."
+
+    layout : bytes = keypair.to_bytes()
+    del keypair
+    ```
+    """
+
+    def to_bytes(self) -> bytes:
+        """serialize the object into bytes."""
+        ...
+
+    @classmethod
+    def from_bytes(cls, data: bytes) -> Self:
+        """deserialize the object from bytes."""
+        ...
+
+
+TProtocol = NewType("TProtocol", str)