fix set_state error handling

[cebtenzzre]

The bug reported is that HASS set_plugin_state can return an error which wasn't handled before, resulting in a TypeError, as reported by both TimW and xtalker (Bob) on Discord:

File "/conf/apps/solar/power_generation_analysis_v3.py", line 466, in update_analysis_sensors
  self.set_state(sensor_name, state=seconds, attributes=attributes, namespace="default")
File "/usr/local/lib/python3.12/site-packages/appdaemon/utils.py", line 289, in wrapper
  return run_coroutine_threadsafe(self, coro, timeout=timeout)
File "/usr/local/lib/python3.12/site-packages/appdaemon/utils.py", line 615, in run_coroutine_threadsafe
  return future.result(timeout.total_seconds())
File "/usr/local/lib/python3.12/concurrent/futures/_base.py", line 456, in result
  return self.__get_result()
File "/usr/local/lib/python3.12/concurrent/futures/_base.py", line 401, in __get_result
  raise self._exception
File "/usr/local/lib/python3.12/site-packages/appdaemon/adapi.py", line 1789, in set_state
  return await self.AD.state.set_state(
File "/usr/local/lib/python3.12/site-packages/appdaemon/state.py", line 793, in set_state
  if "entity_id" in result:
     ^^^^^^^^^^^^^^^^^^^^^
TypeError: argument of type 'ClientResponseError' is not iterable

This PR adds error handling in set_plugin_state consistent with get_plugin_state to fix that error. It also adds fallback to local handling on error, instead of doing nothing. (Let me know if you think that makes sense.)

[cebtenzzre]

oops, forgot you could import this from typing too :)