feat(kon): scaffold hybrid modular workspace

- Cargo workspace with 6 domain crates: core, audio, transcription, ai-formatting, storage, cloud-providers
- Minimal Tauri shell (lib.rs + main.rs) with plugin registration
- Svelte 5 frontend copied from Ramble v0.2
- All crates compile as empty stubs
- App identifier: uk.co.corbel.kon

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/lib/components/UnicodeSpinner.svelte

@@ -0,0 +1,29 @@
+<script>
+  import { onMount, onDestroy } from "svelte";
+
+  let { type = "dots", speed = 100, classes = "" } = $props();
+
+  const sequences = {
+    dots: ["⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"],
+    circle: ["◴", "◷", "◶", "◵"],
+    pulse: ["◉", "◎", "○", "◎"],
+    stars: ["·", "✢", "✳", "✶", "✻", "✽"],
+    orbit: ["⠁", "⠂", "⠄", "⡀", "⢀", "⠠", "⠐", "⠈"],
+  };
+
+  let frame = $state(0);
+  let interval = null;
+  let chars = sequences[type] || sequences.dots;
+
+  onMount(() => {
+    interval = setInterval(() => {
+      frame = (frame + 1) % chars.length;
+    }, speed);
+  });
+
+  onDestroy(() => {
+    if (interval) clearInterval(interval);
+  });
+</script>
+
+<span class="inline-block {classes}" aria-hidden="true">{chars[frame]}</span>