Allow Path in polib.pofile() (#13396)

* Allow PathLike in polib.pofile()

* Add missing import

* [pre-commit.ci] auto fixes from pre-commit.com hooks

* Update type to pathlib.Path

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: m-aciek

stubs/polib/polib.pyi

@@ -1,4 +1,5 @@
 from collections.abc import Callable
+from pathlib import Path
 from typing import IO, Any, Generic, Literal, SupportsIndex, TypeVar, overload
 
 _TB = TypeVar("_TB", bound=_BaseEntry)
@@ -11,9 +12,9 @@ default_encoding: str
 # encoding: str
 # check_for_duplicates: bool
 @overload
-def pofile(pofile: str, *, klass: type[_TP], **kwargs: Any) -> _TP: ...
+def pofile(pofile: str | Path, *, klass: type[_TP], **kwargs: Any) -> _TP: ...
 @overload
-def pofile(pofile: str, **kwargs: Any) -> POFile: ...
+def pofile(pofile: str | Path, **kwargs: Any) -> POFile: ...
 @overload
 def mofile(mofile: str, *, klass: type[_TM], **kwargs: Any) -> _TM: ...
 @overload