refactor using custom callback context

utils/context.py

@@ -0,0 +1,29 @@
+import dataclasses
+from typing import Optional
+
+from telegram import Message
+from telegram.ext import Application, CallbackContext, ExtBot
+
+
+@dataclasses.dataclass
+class EditMessage:
+    url: str
+    forward: tuple[Message, ...]
+
+
+class ChatData:
+    def __init__(self):
+        self.forward_channel_id: Optional[int] = None
+        self.edit_before_forward: bool = False
+        self.edit_message: dict[int, EditMessage] = {}
+        self.template: Optional[str] = None
+
+
+class CustomContext(CallbackContext[ExtBot, dict, ChatData, dict]):
+    def __init__(
+            self,
+            application: Application,
+            chat_id: Optional[int] = None,
+            user_id: Optional[int] = None
+    ):
+        super().__init__(application=application, chat_id=chat_id, user_id=user_id)