feat: unify alerts into one plugin, channels, rules and inbox

packages/plugin-sdk/src/capabilities.ts

@@ -46,6 +46,7 @@ export const CAPABILITY_CATALOG: readonly CapabilityInfo[] = [
   entry("users:write", "high"),
   entry("auth:provide", "high"),
   entry("device:serial", "high"),
+  entry("notify:hub", "high"),
 
   entry("hosts:write", "medium"),
   entry("credentials:use", "medium"),