add get_latest_session_id

pytest_abra/dir_manager.py

@@ -76,3 +76,10 @@ class DirManager:
         env_file = next(self.ENV_FILES.glob(f"*{search_string}*"))
         config: dict[str, str] = dotenv_values(env_file)  # type: ignore
         return config
+
+    @staticmethod
+    def get_latest_session_id(output_dir: Path) -> str:
+        """returns the name of the newest dir inside of output_dir"""
+        all_dirs = [d for d in output_dir.iterdir() if d.is_dir()]
+        newest_dir: Path = max(all_dirs, key=lambda x: x.stat().st_ctime)
+        return newest_dir.name