refactor: convert dev.js to ES module syntax

- Replace CommonJS require() calls with ES module import statements
- Add __dirname and __filename polyfills using fileURLToPath and path.dirname
- Import fileURLToPath from 'url' module for ES module compatibility
- Maintains all original functionality while using modern ES module syntax
- Consistent with prepare.js ES module conversion

Author: AlmostBald-TRADING

clients/typescript/scripts/dev.js

@@ -16,9 +16,13 @@
  *   node scripts/dev.js pre-publish  - Run pre-publish checks/tasks
  */
 
-const { execSync } = require('child_process');
-const fs = require('fs');
-const path = require('path');
+import { execSync } from 'child_process';
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
 
 // Validate we're in the package root
 const packageJsonPath = path.join(__dirname, '..', 'package.json');