Add bot commands setup, inline keyboards, and project dependencies

bot/handlers/__init__.py

@@ -0,0 +1,12 @@
+from aiogram import Router
+from . import user, admin
+
+
+def get_handlers_router() -> Router:
+    """
+    Combines all feature routers (user, admin, etc.) into one main router.
+    """
+    router = Router()
+    router.include_router(user.router)
+    router.include_router(admin.router)
+    return router