chore(api): document version endpoint

api/libretime_api/core/views/info.py

@@ -0,0 +1,14 @@
+from django.conf import settings
+from rest_framework.permissions import AllowAny
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+from ..serializers import VersionSerializer
+
+
+class VersionView(APIView):
+    permission_classes = [AllowAny]
+    serializer_class = VersionSerializer
+
+    def get(self, request):
+        return Response({"api_version": settings.API_VERSION})