feat: Implement comprehensive repository improvements

- Set up ESLint and Prettier for code quality
- Split large script.js into modular architecture (DOM, animations, effects, easter-eggs, sound, interactions)
- Organize assets into proper directory structure (assets/css, assets/js/modules, assets/images)
- Add semantic HTML5 landmarks (header, main, nav, footer)
- Implement ARIA labels and keyboard navigation for accessibility
- Set up Vite build system with minification and optimization
- Add CSS custom properties for design tokens
- Create sitemap.xml and robots.txt for SEO
- Add MIT LICENSE
- Expand README with comprehensive documentation
- Set up GitHub Actions CI/CD workflow
- Optimize build output: ~59KB total (30KB image + 13KB CSS + 16KB JS gzipped)

Co-authored-by: ZaneThePython <102631678+ZaneThePython@users.noreply.github.com>

assets/js/modules/sound.js

@@ -0,0 +1,54 @@
+// Sound effects
+import { DOM } from './dom.js';
+
+// Play sound effect
+export function playSound(type) {
+  const audioContext = new (window.AudioContext || window.webkitAudioContext)();
+
+  if (type === 'click') {
+    const oscillator = audioContext.createOscillator();
+    const gainNode = audioContext.createGain();
+
+    oscillator.connect(gainNode);
+    gainNode.connect(audioContext.destination);
+
+    oscillator.frequency.setValueAtTime(800, audioContext.currentTime);
+    oscillator.frequency.exponentialRampToValueAtTime(400, audioContext.currentTime + 0.1);
+
+    gainNode.gain.setValueAtTime(0.1, audioContext.currentTime);
+    gainNode.gain.exponentialRampToValueAtTime(0.01, audioContext.currentTime + 0.1);
+
+    oscillator.start(audioContext.currentTime);
+    oscillator.stop(audioContext.currentTime + 0.1);
+  } else if (type === 'hover') {
+    const oscillator = audioContext.createOscillator();
+    const gainNode = audioContext.createGain();
+
+    oscillator.connect(gainNode);
+    gainNode.connect(audioContext.destination);
+
+    oscillator.frequency.setValueAtTime(600, audioContext.currentTime);
+    oscillator.frequency.exponentialRampToValueAtTime(800, audioContext.currentTime + 0.05);
+
+    gainNode.gain.setValueAtTime(0.05, audioContext.currentTime);
+    gainNode.gain.exponentialRampToValueAtTime(0.01, audioContext.currentTime + 0.05);
+
+    oscillator.start(audioContext.currentTime);
+    oscillator.stop(audioContext.currentTime + 0.05);
+  }
+}
+
+// Add sound effects to buttons
+export function addSoundEffects() {
+  const buttons = DOM.getAll('.nav-button');
+
+  buttons.forEach((button) => {
+    button.addEventListener('click', function () {
+      playSound('click');
+    });
+
+    button.addEventListener('mouseenter', function () {
+      playSound('hover');
+    });
+  });
+}