fix: replace require() with ES module imports

Removed all require() calls and replaced with proper ES module imports.
The package uses type: module so require() is not available.

Fixed in:
- core/utils.ts: added appendFileSync import
- core/audit-logger.ts: added mkdirSync import
- extension/ext-publish-matrix.ts: added readFileSync import

Author: madhur310

packages/vscode-extension-ci/src/core/audit-logger.ts

@@ -6,7 +6,7 @@
  * repo root or https://opensource.org/licenses/BSD-3-Clause
  */
 
-import { appendFileSync, existsSync } from 'fs';
+import { appendFileSync, existsSync, mkdirSync } from 'fs';
 import { join } from 'path';
 
 interface AuditLogEntry {
@@ -39,8 +39,7 @@ function getAuditLogPath(): string {
   // Ensure log directory exists
   if (!existsSync(logDir)) {
     // Create directory if it doesn't exist
-    const fs = require('fs');
-    fs.mkdirSync(logDir, { recursive: true });
+    mkdirSync(logDir, { recursive: true });
   }
 
   return logFile;

packages/vscode-extension-ci/src/core/utils.ts

@@ -6,10 +6,11 @@
  * repo root or https://opensource.org/licenses/BSD-3-Clause
  */
 
-import { readFileSync, existsSync } from 'fs';
+import { readFileSync, existsSync, appendFileSync } from 'fs';
 import { join } from 'path';
 import { z } from 'zod';
 import chalk from 'chalk';
+import { execSync } from 'child_process';
 import type { SemanticVersion } from './types.js';
 import semver from 'semver';
 
@@ -123,8 +124,7 @@ export function parseEnvironment(): {
 export function setOutput(name: string, value: string): void {
   const githubOutput = process.env['GITHUB_OUTPUT'];
   if (githubOutput) {
-    const fs = require('fs');
-    fs.appendFileSync(githubOutput, `${name}=${value}\n`);
+    appendFileSync(githubOutput, `${name}=${value}\n`);
   } else {
     // Fallback for local development outside GitHub Actions
     console.log(`[output] ${name}=${value}`);

packages/vscode-extension-ci/src/extension/ext-publish-matrix.ts

@@ -8,7 +8,7 @@
  */
 
 import { log } from '../core/utils.js';
-import { readdirSync, existsSync } from 'fs';
+import { readdirSync, existsSync, readFileSync } from 'fs';
 import { join } from 'path';
 
 interface PublishMatrixEntry {
@@ -45,7 +45,7 @@ function getAvailableExtensions(): string[] {
     if (existsSync(packageJsonPath)) {
       try {
         const packageJson = JSON.parse(
-          require('fs').readFileSync(packageJsonPath, 'utf-8'),
+          readFileSync(packageJsonPath, 'utf-8'),
         );
 
         // Only include packages that have a publisher (VS Code extensions)