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/test/cnb-login.ts

@@ -0,0 +1,22 @@
+import { app, showMore, cnbToken } from './common.ts';
+
+const res = await app.run({
+  path: 'user',
+  key: 'cnb-login',
+  payload: {
+    data: {
+      cnbToken
+    }
+  }
+})
+console.log(showMore(res));
+
+const token = res.data.token;
+const me = await app.run({
+  path: 'user',
+  key: 'me',
+  payload: {
+    token
+  }
+})
+console.log(showMore(me));