bug: 错误的 metadata 会导致运行出错

[he0119]

插件加载过程中，不会验证 metadata 格式是否正确。如果一个错误的格式传递给 NoneFlow 会导致其启动报错。

08-20 10:57:33 [SUCCESS] nonebot | NoneBot is initializing...
08-20 10:57:33 [INFO] nonebot | Current Env: prod
08-20 10:57:33 [ERROR] nonebot | Failed to import "publish"
Traceback (most recent call last):
  File "/app/bot.py", line 90, in <module>
    nonebot.load_plugins("src/plugins")
  File "/usr/local/lib/python3.11/site-packages/nonebot/plugin/load.py", line 48, in load_plugins
    return manager.load_all_plugins()
  File "/usr/local/lib/python3.11/site-packages/nonebot/plugin/manager.py", line 175, in load_all_plugins
    return set(
  File "/usr/local/lib/python3.11/site-packages/nonebot/plugin/manager.py", line 176, in <genexpr>
    filter(None, (self.load_plugin(name) for name in self.available_plugins))
> File "/usr/local/lib/python3.11/site-packages/nonebot/plugin/manager.py", line 145, in load_plugin
    module = importlib.import_module(
  File "/usr/local/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "/usr/local/lib/python3.11/site-packages/nonebot/plugin/manager.py", line 241, in exec_module
    super().exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/app/src/plugins/publish/__init__.py", line 13, in <module>
    from .config import plugin_config
  File "/app/src/plugins/publish/config.py", line 49, in <module>
    plugin_config = Config.parse_obj(get_driver().config)
  File "pydantic/main.py", line 526, in pydantic.main.BaseModel.parse_obj
    return cls(**obj)
  File "pydantic/main.py", line 341, in pydantic.main.BaseModel.__init__
    raise validation_error
pydantic.error_wrappers.ValidationError: 1 validation error for Config
plugin_test_metadata -> supported_adapters
  value is not a valid set (type=type_error.set)
08-20 10:57:33 [SUCCESS] nonebot | Running NoneBot...
08-20 10:57:34 [INFO] nonebot | Application startup completed.
08-20 10:57:34 [SUCCESS] nonebot | GitHub *** | [issue_comment.created]: IssueCommentCreated 59150229[32](https://github.com/nonebot/nonebot2/actions/runs/5915022932/job/16040888938#step:6:33) from sender yanyongyu in repository nonebot/nonebot2
08-20 10:57:34 [INFO] nonebot | Shutting down
08-20 10:57:34 [INFO] nonebot | Waiting for application shutdown.
08-20 10:57:[34](https://github.com/nonebot/nonebot2/actions/runs/5915022932/job/16040888938#step:6:35) [INFO] nonebot | Application shutdown complete.

https://github.com/nonebot/nonebot2/actions/runs/5915022932/job/16040888938