feat(communication): housekeeping unban-user composer

HousekeepingUnbanUserComposer (OutgoingHeader 9103) carrying a single
userId int. Response side reuses HousekeepingActionResultEvent — no
new parser needed because the ack shape is action-agnostic.

`yarn compile:fast` clean.

packages/communication/src/messages/outgoing/OutgoingHeader.ts

@@ -527,4 +527,5 @@ export class OutgoingHeader
     public static HOUSEKEEPING_FIND_USER_BY_NAME = 9100;
     public static HOUSEKEEPING_FIND_USER_BY_ID = 9101;
     public static HOUSEKEEPING_BAN_USER = 9102;
+    public static HOUSEKEEPING_UNBAN_USER = 9103;
 }

packages/communication/src/messages/outgoing/housekeeping/HousekeepingUnbanUserComposer.ts

@@ -0,0 +1,21 @@
+import { IMessageComposer } from '@nitrots/api';
+
+export class HousekeepingUnbanUserComposer implements IMessageComposer<ConstructorParameters<typeof HousekeepingUnbanUserComposer>>
+{
+    private _data: ConstructorParameters<typeof HousekeepingUnbanUserComposer>;
+
+    constructor(userId: number)
+    {
+        this._data = [userId];
+    }
+
+    public getMessageArray()
+    {
+        return this._data;
+    }
+
+    public dispose(): void
+    {
+        return;
+    }
+}

packages/communication/src/messages/outgoing/housekeeping/index.ts

@@ -1,3 +1,4 @@
 export * from './HousekeepingBanUserComposer';
 export * from './HousekeepingFindUserByIdComposer';
 export * from './HousekeepingFindUserByNameComposer';
+export * from './HousekeepingUnbanUserComposer';