Add latest issue part on Subscribe page and Create component for Issue

src/components/molecules/NewsletterIssue.svelte

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+<style lang="scss">
+    @import "../../style/molecules/issue";
+</style>
+
+<script lang="ts">
+    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
+</script>
+
+<div class="issue" class:is-large={size === 'large'}>
+    <a href={link} target="_blank" rel="external noopener" tabindex="0">
+        <Image
+            id={thumbnail.id}
+            sizeKey="issue-thumbnail-small"
+            width={160} height={112}
+            alt="Issue {issue} thumbnail"
+        />
+        <dl>
+            <dt>Issue #{issue}</dt>
+            <dd>
+                <p>{title}</p>
+                <time>{dayjs(date).format('DD/MM/YYYY')}</time>
+            </dd>
+        </dl>
+    </a>
+</div>