pytest_plugin(fix): Move pathlib import outside TYPE_CHECKING block

why: Make pathlib available at documentation build time for type hints
what:
- Move pathlib import from TYPE_CHECKING block to regular imports
- Fixes forward reference resolution in sphinx-autodoc-typehints

Author: tony

src/libtmux/pytest_plugin.py

@@ -7,6 +7,7 @@
 import getpass
 import logging
 import os
+import pathlib
 import typing as t
 
 import pytest
@@ -17,8 +18,6 @@
 from libtmux.test.random import get_test_session_name, namer
 
 if t.TYPE_CHECKING:
-    import pathlib
-
     from libtmux.session import Session
 
 logger = logging.getLogger(__name__)