docs(types): Note where StrPath comes from

Author: tony

libvcs/types.py

@@ -1,12 +1,9 @@
 from os import PathLike
 from typing import Union
 
-# See also, if this type is baked in in typing in the future
-# - https://stackoverflow.com/q/53418046/1396928
-# - https://github.com/python/typeshed/issues/5912
-# PathLike = TypeVar("PathLike", str, pathlib.Path)
-# OptionalPathLike = TypeVar("OptionalPathLike", str, pathlib.Path, None)
+# via github.com/python/typeshed/blob/5df8de7/stdlib/_typeshed/__init__.pyi#L115-L118
 
-
-StrOrBytesPath = Union[str, bytes, PathLike[str], PathLike[bytes]]  # stable
+#: :class:`os.PathLike` or :func:`str`
 StrPath = Union[str, PathLike[str]]  # stable
+#: :class:`os.PathLike`, :func:`str` or :term:`bytes-like object`
+StrOrBytesPath = Union[str, bytes, PathLike[str], PathLike[bytes]]  # stable