Implement heuristic cutting on the accessibility tree to get the important nodes; Finish accessibility tree text agent

desktop_env/controllers/python.py

@@ -83,6 +83,8 @@ class PythonController:
         """
         Executes an action on the server computer.
         """
+        if action in ['WAIT', 'FAIL', 'DONE']:
+            return
 
         action_type = action["action_type"]
         parameters = action["parameters"] if "parameters" in action else {}