Extension support page (#1112)

Signed-off-by: Roman <ixrock@gmail.com>
Co-authored-by: Jim Ehrismann <40840436+jim-docker@users.noreply.github.com>

src/extensions/registries/index.ts

@@ -0,0 +1,7 @@
+// All registries managed by extensions api
+
+export * from "./page-registry"
+export * from "./menu-registry"
+export * from "./app-preference-registry"
+export * from "./status-bar-registry"
+export * from "./kube-object-menu-registry";