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/employee/delete/delete.component.ts

@@ -8,6 +8,7 @@ import {
   MatDialogTitle
 } from "@angular/material/dialog";
 import {MatButton} from "@angular/material/button";
+import {MatIcon} from "@angular/material/icon";
 import EmployeeApiService from "../../services/employee-api.service";
 
 @Component({
@@ -17,7 +18,8 @@ import EmployeeApiService from "../../services/employee-api.service";
     MatDialogTitle,
     MatDialogActions,
     MatButton,
-    MatDialogClose
+    MatDialogClose,
+    MatIcon
   ],
   templateUrl: './delete.component.html',
   standalone: true,