feat(api): split api into multiple apps (#1626)

Fixes #1622

- split the api into 4 apps: core, history, schedule, storage
- exploded the settings into testing/prod

api/libretime_api/storage/views/file.py

@@ -0,0 +1,33 @@
+import os
+
+from django.http import FileResponse
+from django.shortcuts import get_object_or_404
+from rest_framework import status, viewsets
+from rest_framework.decorators import action
+from rest_framework.response import Response
+
+from ..models import File
+from ..serializers import FileSerializer
+
+
+class FileViewSet(viewsets.ModelViewSet):
+    queryset = File.objects.all()
+    serializer_class = FileSerializer
+    model_permission_name = "file"
+
+    @action(detail=True, methods=["GET"])
+    def download(self, request, pk=None):
+        if pk is None:
+            return Response("No file requested", status=status.HTTP_400_BAD_REQUEST)
+        try:
+            pk = int(pk)
+        except ValueError:
+            return Response(
+                "File ID should be an integer", status=status.HTTP_400_BAD_REQUEST
+            )
+
+        filename = get_object_or_404(File, pk=pk)
+        directory = filename.directory
+        path = os.path.join(directory.directory, filename.filepath)
+        response = FileResponse(open(path, "rb"), content_type=filename.mime)
+        return response