add new method for Router

aiogram/dispatcher/router.py

@@ -179,6 +179,12 @@ class Router:
         self._parent_router = router
         router.sub_routers.append(self)
 
+    def include_routers(self, *routers):
+        if not routers:
+            raise ValueError("You must provide routers")
+        for router in routers:
+            self.include_router(router)
+
     def include_router(self, router: Router) -> Router:
         """
         Attach another router.