Rename files

To keep it consistent with main, I have renamed files that are not part
of app from filename to "_filename" out of app. I also cleaned up the
outdated user-service because it was renamed already.

Author: LimZiJia

frontend/src/app/environments/environment.ts renamed to frontend/src/_environments/environment.ts

@@ -3,7 +3,7 @@ import { HttpRequest, HttpHandler, HttpEvent, HttpInterceptor } from '@angular/c
 import { Observable, throwError } from 'rxjs';
 import { catchError } from 'rxjs/operators';
 
-import { AuthenticationService } from '../../services/authentication.service';
+import { AuthenticationService } from '../../_services/authentication.service';
 
 @Injectable()
 export class ErrorInterceptor implements HttpInterceptor {

frontend/src/app/helpers/interceptors/error.interceptor.ts renamed to frontend/src/_helpers/interceptors/error.interceptor.ts

@@ -2,8 +2,8 @@ import { TestBed } from '@angular/core/testing';
 import { HttpTestingController, provideHttpClientTesting } from '@angular/common/http/testing';
 import { HTTP_INTERCEPTORS, HttpClient } from '@angular/common/http';
 import { JwtInterceptor } from './jwt.interceptor';
-import { AuthenticationService } from '../../services/authentication.service';
-import { environment } from '../../environments/environment';
+import { AuthenticationService } from '../../_services/authentication.service';
+import { environment } from '../../_environments/environment';
 
 describe('JwtInterceptor', () => {
     let httpMock: HttpTestingController;

frontend/src/app/helpers/interceptors/jwt.interceptor.spec.ts renamed to frontend/src/_helpers/interceptors/jwt.interceptor.spec.ts

@@ -2,8 +2,8 @@ import { Injectable } from '@angular/core';
 import { HttpRequest, HttpHandler, HttpEvent, HttpInterceptor } from '@angular/common/http';
 import { Observable } from 'rxjs';
 
-import { environment } from '../../environments/environment';
-import { AuthenticationService } from '../../services/authentication.service';
+import { environment } from '../../_environments/environment';
+import { AuthenticationService } from '../../_services/authentication.service';
 
 @Injectable()
 export class JwtInterceptor implements HttpInterceptor {

frontend/src/app/helpers/interceptors/jwt.interceptor.ts renamed to frontend/src/_helpers/interceptors/jwt.interceptor.ts

@@ -3,8 +3,8 @@ import { Router } from '@angular/router';
 import { HttpClient } from '@angular/common/http';
 import { BehaviorSubject, Observable } from 'rxjs';
 import { map, switchMap, tap } from 'rxjs/operators';
-import { environment } from '../environments/environment';
-import { User } from '../models/user.model';
+import { environment } from '../_environments/environment';
+import { User } from '../_models/user.model';
 
 @Injectable({ providedIn: 'root' })
 export class AuthenticationService {

frontend/src/app/models/user.model.ts renamed to frontend/src/_models/user.model.ts

@@ -7,7 +7,7 @@ import { PasswordModule } from 'primeng/password';
 import { ButtonModule } from 'primeng/button';
 import { ToastModule } from 'primeng/toast';
 import { MessageService } from 'primeng/api';
-import { AuthenticationService } from '../services/authentication.service';
+import { AuthenticationService } from '../../_services/authentication.service';
 
 @Component({
     selector: 'app-login',

frontend/src/app/services/authentication.service.ts renamed to frontend/src/_services/authentication.service.ts

@@ -12,7 +12,7 @@ import { PASSWORD_WEAK, STRONG_PASSWORD_REGEX, weakPasswordValidator } from './_
 import { mismatchPasswordValidator, PASSWORD_MISMATCH } from './_validators/mismatch-password.validator';
 import { invalidUsernameValidator, USERNAME_INVALID } from './_validators/invalid-username.validator';
 import { invalidPasswordValidator, PASSWORD_INVALID } from './_validators/invalid-password.validator';
-import { AuthenticationService } from '../services/authentication.service';
+import { AuthenticationService } from '../../_services/authentication.service';
 
 @Component({
     selector: 'app-register',

frontend/src/app/account/login.component.ts

@@ -3,8 +3,8 @@ import { provideRouter } from '@angular/router';
 import { HTTP_INTERCEPTORS, provideHttpClient } from '@angular/common/http';
 import { routes } from './app.routes';
 import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
-import { JwtInterceptor } from './helpers/interceptors/jwt.interceptor';
-import { ErrorInterceptor } from './helpers/interceptors/error.interceptor';
+import { JwtInterceptor } from '../_helpers/interceptors/jwt.interceptor';
+import { ErrorInterceptor } from '../_helpers/interceptors/error.interceptor';
 
 export const appConfig: ApplicationConfig = {
     providers: [