feat: NCS-69 Challenge request (#3)

- create challange window
- challanges view page
- decline and accept
- notif tab (wip)
- active game window (wip)

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Co-authored-by: shahdlala66 <shahd.lala66@gmail.com>
Co-authored-by: Lala, Shahd <Shahd.Lala@sybit.de>
Reviewed-on: #3

src/app/pages/welcome/welcome.component.html

@@ -46,6 +46,13 @@
             <div class="w" *ngFor="let win of windows['wA3']" [ngStyle]="win.style"></div>
           </div>
         </div>
+
+        <!-- Draggable Meat Emoji -->
+        @if (showMeatEmoji) {
+        <div class="meat-emoji" [style.left.px]="meatX" [style.top.px]="meatY" (mousedown)="onMeatMouseDown($event)">
+          🍖
+        </div>
+        }
       </div>
 
       <div class="bwrap" style="left:21%;width:15%;">