feat: add CNB login functionality and user management

- Introduced `cnb-login` route to handle user login via CNB token.
- Created `CnbServices` class for managing CNB user interactions.
- Added `findByCnbId` method in the User model to retrieve users by CNB ID.
- Updated error handling to provide more structured error messages.
- Enhanced user creation logic to handle CNB users.
- Added tests for the new CNB login functionality.

src/routes/user/modules/cnb-services.ts

@@ -0,0 +1,37 @@
+import { CNB } from '@kevisual/cnb'
+import { UserModel } from '../../../auth/index.ts';
+import { CustomError } from '@kevisual/router';
+
+export class CnbServices {
+  cnb: CNB;
+  constructor(token?: string) {
+    this.cnb = new CNB({
+      token,
+    });
+  }
+
+  async login(): Promise<ReturnType<typeof UserModel.prototype.createToken>> {
+    const cnbUserRes = await this.cnb.user.getUser();
+    if (cnbUserRes.code !== 200) {
+      throw new CustomError('CNB Token is invalid');
+    }
+    const cnbUser = cnbUserRes?.data;
+    const cnbUserId = cnbUser?.id
+    if (!cnbUserId) {
+      throw new CustomError('CNB User ID is missing');
+    }
+    let user = await UserModel.findByCnbId(cnbUserId);
+    if (!user) {
+      const username = '@cnb-' + cnbUser.username;
+      // 如果用户不存在，创建一个新用户
+      user = await UserModel.createUser(username, cnbUserId);
+      user.data = {
+        ...user.data,
+        cnbId: cnbUserId,
+      }
+      await user.save();
+    }
+    const token = await user.createToken();
+    return token;
+  }
+}