feat(): push notifications via firebase admin

src/template_project/adapters/notifications/fcm.py

@@ -0,0 +1,20 @@
+import asyncio
+from typing import override
+
+from firebase_admin import messaging  # type: ignore[import-untyped]
+from firebase_admin.messaging import Message, Notification  # type: ignore[import-untyped]
+
+from template_project.application.common.notifications.service import NotificationService
+
+
+class FCMNotificationService(NotificationService):
+    def __init__(self) -> None:
+        pass
+
+    @override
+    async def send_notification(self, identifier: str, title: str, body: str) -> None:
+        message = Message(
+            token=identifier,
+            notification=Notification(title=title, body=body),
+        )
+        await asyncio.to_thread(messaging.send, message)