feat(telegram_bot): added filters folder

solution/services/telegram_bot/filters/auth.py

@@ -0,0 +1,17 @@
+from aiogram.filters import Filter
+from aiogram.fsm.context import FSMContext
+from aiogram.types import Message
+
+
+class AuthenticatedFilter(Filter):
+    def __init__(self) -> None:
+        pass
+
+    async def __call__(
+        self,
+        message: Message,
+        state: FSMContext,
+    ) -> bool:
+        state_data = await state.get_data()
+
+        return bool(state_data.get("authenticated"))