🏗️ change exception structure

nonebot/adapters/cqhttp/exception.py

@@ -0,0 +1,29 @@
+from nonebot.exception import AdapterException, ActionFailed
+
+
+class CQHTTPAdapterException(AdapterException):
+
+    def __init__(self):
+        super().__init__("cqhttp")
+
+
+class ApiError(CQHTTPAdapterException, ActionFailed):
+    """
+    :说明:
+
+      API 请求返回错误信息。
+
+    :参数:
+
+      * ``retcode: Optional[int]``: 错误码
+    """
+
+    def __init__(self, retcode: Optional[int] = None):
+        super().__init__()
+        self.retcode = retcode
+
+    def __repr__(self):
+        return f"<ActionFailed retcode={self.retcode}>"
+
+    def __str__(self):
+        return self.__repr__()