tests(conftest): Add tmp_path fixture for doctests

Author: tony

conftest.py

@@ -63,6 +63,7 @@ def socket_name(request) -> str:
 def add_doctest_fixtures(
     request: pytest.FixtureRequest,
     doctest_namespace: t.Dict[str, t.Any],
+    tmp_path: pathlib.Path,
 ) -> None:
     if isinstance(request._pyfuncitem, DoctestItem) and shutil.which("tmux"):
         doctest_namespace["server"] = request.getfixturevalue("server")
@@ -71,3 +72,4 @@ def add_doctest_fixtures(
         doctest_namespace["window"] = session.attached_window
         doctest_namespace["pane"] = session.attached_pane
         doctest_namespace["test_utils"] = test_utils
+        doctest_namespace["tmp_path"] = tmp_path