更新代码仓库相关功能，修改 API 参数，添加删除仓库功能，更新文档和测试用例

src/index.ts

@@ -9,7 +9,6 @@ import { Mission } from "./mission/index.ts";
 import { AiBase } from "./ai/index.ts";
 
 type CNBOptions = CNBCoreOptions<{
-  group?: string;
 }>;
 
 export class CNB extends CNBCore {
@@ -21,7 +20,6 @@ export class CNB extends CNBCore {
   issue!: Issue;
   mission!: Mission;
   ai!: AiBase;
-  group!: string;
   constructor(options: CNBOptions) {
     super({ token: options.token, cookie: options.cookie, cnb: options.cnb });
     this.init(options);