Brushed up the backend, added writing task 1 academic prompt gen and grading ENCOA-274

ielts_be/repositories/abc/file_storage.py

@@ -0,0 +1,16 @@
+from abc import ABC, abstractmethod
+
+
+class IFileStorage(ABC):
+
+    @abstractmethod
+    async def download_firebase_file(self, source_blob_name, destination_file_name):
+        pass
+
+    @abstractmethod
+    async def upload_file_firebase_get_url(self, destination_blob_name, source_file_name):
+        pass
+
+    @abstractmethod
+    async def make_public(self, blob_name: str):
+        pass