feat: add web file manager UI and S3 catch-all route

src/routes/home.ts

@@ -0,0 +1,9 @@
+export const handleHome = async (): Promise<Response> => {
+  const html = await Bun.file('src/home.html').text();
+  return new Response(html, {
+    status: 200,
+    headers: {
+      'content-type': 'text/html; charset=utf-8',
+    },
+  });
+};