Rewrite in bun and vite away from NextJs

Co-authored-by: Copilot <copilot@github.com>

src/components/Lead.tsx

@@ -0,0 +1,17 @@
+import React from 'react';
+import styles from '../../styles/Lead.module.scss';
+
+const Lead = () => {
+  return (
+    <div className={styles.leadContainer}>
+      <h2 className={styles.leadTitle}>
+        Runofestivaali saariston sylissä!
+        <span className={styles.dateAndPlace}>
+          11. - 13.6.2026
+        </span>
+      </h2>
+    </div>
+  );
+};
+
+export default Lead;