feat: implement proxy-clear-config

This will allow us to kill stale proxy configuration within apps, which is critical during application renames.

- redirect rmdir output to dev-null
- trigger a proxy-clear-config (new trigger) when renaming an application
  - The configuration will be rebuilt during the later `ps_rebuild`

Closes #3231

plugins/20_events/network-clear-config

@@ -0,0 +1 @@
+hook

plugins/20_events/proxy-clear-config

@@ -0,0 +1 @@
+hook