chore: project scaffold, build config, scripts and README

Bun + SvelteKit (static adapter) + Electron project files, icon resources,
dev/e2e/bench scripts and the README documenting the app.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

svelte.config.js

@@ -0,0 +1,20 @@
+import adapter from '@sveltejs/adapter-static';
+
+/** @type {import('@sveltejs/kit').Config} */
+export default {
+  kit: {
+    // Electron serves build/ through the app:// protocol, so the app is a pure SPA.
+    adapter: adapter({ pages: 'build', assets: 'build', fallback: 'index.html', strict: false }),
+    csp: {
+      mode: 'hash',
+      directives: {
+        'default-src': ['self'],
+        'script-src': ['self'],
+        'style-src': ['self', 'unsafe-inline'],
+        'font-src': ['self', 'data:'],
+        'img-src': ['self', 'data:', 'blob:', 'notes-media:'],
+        'connect-src': ['self', 'ws://localhost:5173', 'http://localhost:5173']
+      }
+    }
+  }
+};