update feedback form, tambahan lib untuk star rating

src/lib/StarRating.svelte

@@ -0,0 +1,24 @@
+<script>
+  export let value = 0;
+  export let name = '';
+  export let size = 'base'; // 'base', 'lg', 'xl'
+
+  let sizeClass = {
+    base: 'text-2xl',
+    lg: 'text-3xl',
+    xl: 'text-4xl'
+  }[size] || 'text-2xl';
+</script>
+
+<div class="flex items-center gap-1">
+  {#each Array(5) as _, i}
+    <button
+      type="button"
+      class={`focus:outline-none ${sizeClass}`}
+      on:click={() => value = i + 1}
+      aria-label="{name} {i + 1} stars"
+    >
+      <span class={i < value ? 'text-yellow-400' : 'text-gray-300'}>★</span>
+    </button>
+  {/each}
+</div>