Add bot commands setup, inline keyboards, and project dependencies

bot/handlers/admin.py

@@ -0,0 +1,14 @@
+from aiogram import Router
+from aiogram.filters import Command
+from aiogram.types import Message
+
+router = Router()
+
+
+@router.message(Command("admin"))
+async def cmd_admin(message: Message):
+    """
+    Handles /admin command (placeholder).
+    In production, you'd restrict this using a custom filter or admin ID list.
+    """
+    await message.answer("Welcome to the Admin panel. Currently, no admin tasks are configured.")