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/core/views/preference.py

@@ -0,0 +1,16 @@
+from rest_framework import viewsets
+
+from ..models import Preference, StreamSetting
+from ..serializers import PreferenceSerializer, StreamSettingSerializer
+
+
+class PreferenceViewSet(viewsets.ModelViewSet):
+    queryset = Preference.objects.all()
+    serializer_class = PreferenceSerializer
+    model_permission_name = "preference"
+
+
+class StreamSettingViewSet(viewsets.ModelViewSet):
+    queryset = StreamSetting.objects.all()
+    serializer_class = StreamSettingSerializer
+    model_permission_name = "streamsetting"