[+] mai2: support adding rival

AquaNet/src/libs/sdk.ts

@@ -305,6 +305,8 @@ export const GAME = {
     post(`/api/v2/game/${game}/export`),
   import: (game: GameName, data: any): Promise<Record<string, any>> =>
     post(`/api/v2/game/${game}/import`, {}, { body: JSON.stringify(data) }),
+  setRival: (game: GameName, rivalUserName: string, isAdd: boolean) =>
+    post(`/api/v2/game/${game}/set-rival`, { rivalUserName, isAdd }),
 }
 
 export const DATA = {