Add torrent file explorer

svelte/src/file_viewer/viewers/TorrentItem.svelte

@@ -0,0 +1,28 @@
+<script>
+import { formatDataVolume } from "../../util/Formatting.svelte";
+
+export let item = {
+	size: 0,
+	children: null,
+}
+</script>
+
+<ul class="list_open">
+	{#each Object.entries(item.children) as [name, child]}
+		<li class:list_closed={!child.children}>
+			{name} ({formatDataVolume(child.size, 3)})<br/>
+			{#if child.children}
+				<svelte:self item={child}></svelte:self>
+			{/if}
+		</li>
+	{/each}
+</ul>
+
+<style>
+.list_open {
+	list-style-type: disclosure-open;
+}
+.list_closed {
+	list-style-type: disc;
+}
+</style>