refactor: migrate to Svelte 5

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

apps/website/src/components/molecules/NewsletterIssue/NewsletterIssue.svelte

@@ -6,12 +6,21 @@
     import dayjs from 'dayjs'
     import Image from '$components/atoms/Image.svelte'
 
-    export let title: string
-    export let issue: number
-    export let date: string
-    export let link: string
-    export let thumbnail: { id: string }
-    export let size: string = undefined
+    let {
+        title,
+        issue,
+        date,
+        link,
+        thumbnail,
+        size,
+    }: {
+        title: string
+        issue: number
+        date: string
+        link: string
+        thumbnail: { id: string }
+        size?: string
+    } = $props()
 </script>
 
 <div class="issue" class:is-large={size === 'large'}>