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>

eslint.config.js

@@ -0,0 +1,47 @@
+import js from '@eslint/js';
+import html from 'eslint-plugin-html';
+import prettier from 'eslint-config-prettier';
+
+export default [
+  js.configs.recommended,
+  prettier,
+  {
+    files: ['**/*.js', '**/*.html'],
+    plugins: {
+      html,
+    },
+    languageOptions: {
+      ecmaVersion: 'latest',
+      sourceType: 'module',
+      globals: {
+        console: 'readonly',
+        window: 'readonly',
+        document: 'readonly',
+        navigator: 'readonly',
+        requestAnimationFrame: 'readonly',
+        setTimeout: 'readonly',
+        setInterval: 'readonly',
+        clearInterval: 'readonly',
+        IntersectionObserver: 'readonly',
+        __dirname: 'readonly',
+      },
+    },
+    rules: {
+      'no-unused-vars': 'warn',
+      'no-console': 'off',
+      'prefer-const': 'warn',
+      'no-var': 'warn',
+    },
+  },
+  {
+    ignores: [
+      'node_modules/**',
+      'dist/**',
+      'build/**',
+      '*.min.js',
+      '*.min.css',
+      'script.js',
+      'styles.css',
+    ],
+  },
+];