refactor

src/handlers/registration_handlers.py

@@ -2,6 +2,8 @@
 from aiogram import Router, F
 from aiogram.types import Message, CallbackQuery, InlineKeyboardButton, InlineKeyboardMarkup
 from aiogram.filters import Command, StateFilter
+
+from src.filters.case_insensitive import CaseInsensitiveCommand
 from aiogram.fsm.context import FSMContext
 from aiogram.fsm.state import State, StatesGroup
 import logging