Add profile and settings page placeholders; Expand routing

frontend/src/app/Views/header/header.component.html

@@ -5,7 +5,18 @@
     mat-icon-button
     class="example-icon favorite-icon"
     aria-label="Example icon-button with heart icon"
+    [matMenuTriggerFor]="menu"
   >
     <mat-icon>settings</mat-icon>
   </button>
+  <mat-menu #menu="matMenu">
+    <button mat-menu-item routerLink="/profile">
+      <mat-icon>account_circle</mat-icon>
+      <span>Profile</span>
+    </button>
+    <button mat-menu-item routerLink="/settings">
+      <mat-icon>ballot</mat-icon>
+      <span>Bot Settings</span>
+    </button>
+  </mat-menu>
 </mat-toolbar>