Adding favorite icon

src/scss/thumbnail-carousel.scss

@@ -25,4 +25,12 @@
   // Restrict images to a maximum of thumbnail size.
   max-width: var(--frigate-card-carousel-thumbnail-size);
   max-height: var(--frigate-card-carousel-thumbnail-size);
+}
+.favorite {
+  position: absolute;
+  height: 30px;
+  width: 30px;
+  top: 8;
+  right: 8;
+  color: yellow;
 }