feat(telegram_bot): added commands folder

solution/services/telegram_bot/commands/start.py

@@ -0,0 +1,27 @@
+from aiogram import Router
+from aiogram.filters import CommandStart
+from aiogram.fsm.context import FSMContext
+from aiogram.types import Message
+from aiogram_dialog import DialogManager, StartMode
+
+from states.start import StartDialogState
+
+start_router = Router()
+
+
+@start_router.message(CommandStart())
+async def start_command(
+    message: Message, dialog_manager: DialogManager, state: FSMContext
+) -> None:
+    state_data = await state.get_data()
+
+    if state_data["authenticated"]:
+        await message.answer(
+            "Already authenticated as"
+            f" <code>{state_data['advertiser']['name']}</code>"
+        )
+        return
+
+    await dialog_manager.start(
+        state=StartDialogState.start, mode=StartMode.RESET_STACK
+    )