feat: add workbench channel templates

apps/web/src/features/workbench/channels/NotesSourcesChannel.svelte

@@ -0,0 +1,19 @@
+<script lang="ts">
+  import type { InspectorItem, NoteSourceItem } from '../types';
+
+  export let items: NoteSourceItem[];
+  export let onInspect: (item: InspectorItem) => void;
+
+  function inspectItem(item: NoteSourceItem) {
+    onInspect({ title: item.title, type: item.kind, description: `${item.source} record in this project.`, properties: [{ label: 'Updated', value: item.updatedAt }, { label: 'Tag', value: item.tag }, { label: 'Source', value: item.source }] });
+  }
+</script>
+
+<section class="channel-page notes-sources-channel">
+  <header class="channel-header"><p>Project reference</p><h1>Notes & Sources</h1></header>
+  <div class="file-list">
+    {#each items as item}
+      <article class="file-row"><span>{item.kind}</span><div><h2>{item.title}</h2><small>{item.source} · {item.updatedAt} · #{item.tag}</small></div><button aria-label={`Inspect ${item.title}`} on:click={() => inspectItem(item)}>Inspect</button></article>
+    {/each}
+  </div>
+</section>