GREG-25: Adding namespace versioning

Adding namespace-versioning to API.

The swagger interface has been checked and it still works.

It is now possible to look at at a variable in the request (request.version) to inspect the namespace used.

greg/urls.py

@@ -27,14 +27,14 @@ urlpatterns: List[URLResolver] = [
         "schema/",
         SpectacularAPIView.as_view(versioning_class=NamespaceVersioning),
         name="schema",
-    ),
+    ),  # type: ignore
     path(
         "schema/swagger-ui/",
         SpectacularSwaggerView.as_view(
             url_name="schema", versioning_class=NamespaceVersioning
-        ),
+        ),  # type: ignore
         name="swagger-ui",
     ),
-    path("health/", Health.as_view()),
+    path("health/", Health.as_view()),  # type: ignore
     path("api/v1/", include((api_urls.urlpatterns, "greg"), namespace="v1")),
 ]