docs(conf): Add sphinx-autodoc-typehints config, fix pathlib import

why: Improve documentation type hint handling and fix forward reference
what:
- Add always_document_param_types = True for consistent param docs
- Move pathlib import outside TYPE_CHECKING block in pytest_plugin.py
  to make it available at doc build time

Author: tony

docs/conf.py

@@ -118,6 +118,9 @@
 autodoc_class_signature = "separated"
 toc_object_entries_show_parents = "hide"
 
+# sphinx-autodoc-typehints
+always_document_param_types = True
+
 # sphinx-copybutton
 copybutton_prompt_text = (
     r">>> |\.\.\. |> |\$ |\# | In \[\d*\]: | {2,5}\.\.\.: | {5,8}: "

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__)