Enhance employee and qualification forms with hints and improved layouts (#37)

- Added hints to input fields in create and edit employee forms for better user guidance.
- Updated the layout of dialog actions in employee and qualification forms for improved usability.
- Enhanced delete confirmation dialogs for qualifications and employees with better styling and error handling.
- Improved the display of employee details and qualifications with better formatting and structure.

These changes aim to improve user experience and accessibility across the application.

Reviewed-on: http://git.simonis.lol/angular/ems-frontend/pulls/37
Co-authored-by: Jan-Marlon Leibl <jleibl@proton.me>
Co-committed-by: Jan-Marlon Leibl <jleibl@proton.me>

src/app/qualification/delete/delete.component.ts

@@ -10,6 +10,8 @@ import {FormsModule, ReactiveFormsModule} from "@angular/forms";
 import QualificationService from "../../services/qualification.service";
 import {MatButton} from "@angular/material/button";
 import {HttpErrorResponse} from "@angular/common/http";
+import { MatError } from '@angular/material/form-field'
+import {MatIcon} from "@angular/material/icon";
 
 @Component({
   selector: 'app-delete-qualification',
@@ -19,7 +21,9 @@ import {HttpErrorResponse} from "@angular/common/http";
     MatDialogTitle,
     ReactiveFormsModule,
     MatDialogActions,
-    MatButton
+    MatButton,
+    MatError,
+    MatIcon
   ],
   templateUrl: './delete.component.html',
   standalone: true,