refactor: migrate to Svelte 5

use runes ($props, $state, $derived, $effect, etc)

apps/website/src/components/atoms/Badge.svelte

@@ -23,8 +23,13 @@
 </style>
 
 <script lang="ts">
-    export let text: string
-    export let size = 'small'
+    let {
+        text,
+        size = 'small',
+    }: {
+        text: string
+        size?: string
+    } = $props()
 </script>
 
 <div class="badge badge--{size}">