flows: mount executor under api, implement initial challenge design

authentik/api/v2/urls.py

@@ -29,6 +29,7 @@ from authentik.flows.api import (
     FlowViewSet,
     StageViewSet,
 )
+from authentik.flows.views import FlowExecutorView
 from authentik.outposts.api.outpost_service_connections import (
     DockerServiceConnectionViewSet,
     KubernetesServiceConnectionViewSet,
@@ -184,4 +185,9 @@ urlpatterns = [
         name="schema-swagger-ui",
     ),
     path("redoc/", SchemaView.with_ui("redoc", cache_timeout=0), name="schema-redoc"),
+    path(
+        "flows/executor/<slug:flow_slug>/",
+        FlowExecutorView.as_view(),
+        name="flow-executor",
+    ),
 ] + router.urls