style: introduce ruff as linter and formatter (#1356)

* style: remove necessary imports

* style: fix F841

* style: fix F401

* style: fix F811

* style: fix E402

* style: fix E721

* style: fix E722

* style: fix E722

* style: fix F541

* style: ruff format

* style: all passed

* style: add ruff in deps

* style: more ignores in ruff.toml

* style: add pre-commit

pkg/command/operators/func.py

@@ -1,16 +1,15 @@
 from __future__ import annotations
 from typing import AsyncGenerator
 
-from .. import operator, entities, cmdmgr
-from ...plugin import context as plugin_context
+from .. import operator, entities
 
 
-@operator.operator_class(name="func", help="查看所有已注册的内容函数", usage='!func')
+@operator.operator_class(name='func', help='查看所有已注册的内容函数', usage='!func')
 class FuncOperator(operator.CommandOperator):
     async def execute(
         self, context: entities.ExecuteContext
     ) -> AsyncGenerator[entities.CommandReturn, None]:
-        reply_str = "当前已启用的内容函数: \n\n"
+        reply_str = '当前已启用的内容函数: \n\n'
 
         index = 1
 
@@ -19,7 +18,7 @@ class FuncOperator(operator.CommandOperator):
         )
 
         for func in all_functions:
-            reply_str += "{}. {}:\n{}\n\n".format(
+            reply_str += '{}. {}:\n{}\n\n'.format(
                 index,
                 func.name,
                 func.description,