change file structure

Reviewed-on: #21
Reviewed-by: Get in my car i have candy <huydw@proton.me>

src/app/employee/delete/delete.component.html

@@ -0,0 +1,6 @@
+<h2 mat-dialog-title>Delete {{employee.firstName}} {{employee.lastName}}</h2>
+<mat-dialog-content>Are you sure you want to delete {{employee.firstName}} {{employee.lastName}}? This cant be undone.</mat-dialog-content>
+<mat-dialog-actions>
+  <button mat-button mat-dialog-close>Cancel</button>
+  <button mat-button [mat-dialog-close]="true" (click)="deleteEmployee(employee.id ?? 0)">Delete</button>
+</mat-dialog-actions>