feat: Enhance UserScript structure and functionality

- Updated package.json to include new scripts for development, production builds, linting, formatting, and cleaning.
- Added ESLint and Prettier for code quality and formatting.
- Refactored main application class to extend EventEmitter and manage modules.
- Introduced ExampleModule to demonstrate module structure and functionality.
- Created utility classes for DOM manipulation, event handling, and persistent storage.
- Added TypeScript definitions for UserScript environment.
- Improved TypeScript configuration with stricter checks and path aliases.
- Updated Vite configuration to handle development and production builds more effectively.
- Enhanced user script header generation to support environment-specific configurations.

.eslintrc.js

@@ -0,0 +1,39 @@
+module.exports = {
+  root: true,
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint'],
+  extends: ['eslint:recommended'],
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: 'module',
+  },
+  env: {
+    browser: true,
+    es6: true,
+    node: true,
+  },
+  globals: {
+    // Greasemonkey/Tampermonkey globals
+    GM_setValue: 'readonly',
+    GM_getValue: 'readonly',
+    GM_deleteValue: 'readonly',
+    GM_listValues: 'readonly',
+    GM_log: 'readonly',
+    GM_notification: 'readonly',
+    GM_openInTab: 'readonly',
+    GM_registerMenuCommand: 'readonly',
+    GM_unregisterMenuCommand: 'readonly',
+    GM_xmlhttpRequest: 'readonly',
+    GM_info: 'readonly',
+    unsafeWindow: 'readonly',
+  },
+  rules: {
+    'no-console': 'off',
+    'no-debugger': 'warn',
+    'prefer-const': 'error',
+    'no-var': 'error',
+    'no-unused-vars': 'off',
+    'no-undef': 'off',
+  },
+  ignorePatterns: ['dist/', 'node_modules/', 'tools/**/*.js'],
+};