Convert qualifications to table (#13)

Co-authored-by: Phan Huy Tran <p.tran@neusta.de>
Reviewed-on: #13

src/app/qualifications/qualifications.component.html

@@ -1,7 +1,22 @@
-<ul>
-  @for (qualification of qualifications$ | async; track qualification.skill) {
-    <li>
-      {{ qualification.skill }}
-    </li>
-  }
-</ul>
+@if (qualifications$ | async; as qualifications) {
+    @if (qualifications) {
+        <table
+                mat-table
+                [dataSource]="qualifications"
+                class="mat-elevation-z8"
+        >
+            <ng-container matColumnDef="skill">
+                <th mat-header-cell *matHeaderCellDef>Skill</th>
+                <td mat-cell *matCellDef="let qualification">{{ qualification.skill }}</td>
+            </ng-container>
+
+            <ng-container matColumnDef="actions">
+                <th mat-header-cell *matHeaderCellDef>Actions</th>
+                <td mat-cell *matCellDef="let qualification"></td>
+            </ng-container>
+
+            <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
+            <tr mat-row *matRowDef="let row; columns: displayedColumns"></tr>
+        </table>
+    }
+}