Add Settings Popup

src/app/features/header-menu/header-menu.scss

@@ -81,5 +81,16 @@
     flex-grow: 1;
     justify-content: flex-end;
     padding: 12px 20px;
+
+    .settings {
+      position: relative;
+      z-index: 10;
+      cursor: pointer;
+      transition: transform 0.3s ease;
+
+      &:hover {
+        transform: rotate(30deg);
+      }
+    }
   }
 }