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>

src/app.html

@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en" data-theme="dark">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="color-scheme" content="dark light" />
+    <title>Ink</title>
+    <link rel="icon" type="image/png" href="%sveltekit.assets%/favicon.png" />
+    %sveltekit.head%
+  </head>
+  <body data-sveltekit-preload-data="off">
+    <div style="display: contents">%sveltekit.body%</div>
+  </body>
+</html>