feat(communication): housekeeping ban-user + generic action-result

* HousekeepingBanUserComposer (OutgoingHeader 9102): (userId,
  reason, hours).

* HousekeepingActionResultEvent + Parser (IncomingHeader 9201):
  generic ack carrying (actionKey, ok, actionId, message). Same
  parser will back mute / kick / give-credits / room-close / etc.
  callers — adding a new HK action only needs a new outgoing
  composer plus the right ACTION_KEY constant on the server side.

vitest 138/138, `yarn compile:fast` clean.

packages/communication/src/messages/incoming/housekeeping/HousekeepingActionResultEvent.ts

@@ -0,0 +1,16 @@
+import { IMessageEvent } from '@nitrots/api';
+import { MessageEvent } from '@nitrots/events';
+import { HousekeepingActionResultParser } from '../../parser';
+
+export class HousekeepingActionResultEvent extends MessageEvent implements IMessageEvent
+{
+    constructor(callBack: Function)
+    {
+        super(callBack, HousekeepingActionResultParser);
+    }
+
+    public getParser(): HousekeepingActionResultParser
+    {
+        return this.parser as HousekeepingActionResultParser;
+    }
+}