Remove fs-extra dependency from bundle-size-checker

Replace fs-extra with native Node.js fs/promises module to eliminate external dependency.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: Janpot

packages/bundle-size-checker/package.json

@@ -35,7 +35,6 @@
     "execa": "^7.2.0",
     "fast-glob": "^3.3.2",
     "file-loader": "^6.2.0",
-    "fs-extra": "^11.2.0",
     "micromatch": "^4.0.8",
     "piscina": "^4.2.1",
     "rollup-plugin-visualizer": "^6.0.1",
@@ -47,7 +46,6 @@
   },
   "devDependencies": {
     "@types/env-ci": "^3.1.4",
-    "@types/fs-extra": "^11.0.4",
     "@types/micromatch": "^4.0.9",
     "@types/webpack": "^5.28.5",
     "@types/webpack-bundle-analyzer": "^4.7.0",

packages/bundle-size-checker/src/cli.js

@@ -2,7 +2,7 @@
 
 import path from 'path';
 import os from 'os';
-import fse from 'fs-extra';
+import fs from 'fs/promises';
 import yargs from 'yargs';
 import Piscina from 'piscina';
 import micromatch from 'micromatch';
@@ -31,7 +31,8 @@ async function getWebpackSizes(args, config) {
   });
   // Clean and recreate the build directory
   const buildDir = path.join(rootDir, 'build');
-  await fse.emptyDir(buildDir);
+  await fs.rm(buildDir, { recursive: true, force: true });
+  await fs.mkdir(buildDir, { recursive: true });
 
   if (
     !config ||
@@ -89,8 +90,8 @@ async function run(argv) {
   const bundleSizes = Object.fromEntries(webpackSizes.sort((a, b) => a[0].localeCompare(b[0])));
 
   // Ensure output directory exists
-  await fse.mkdirp(path.dirname(snapshotDestPath));
-  await fse.writeJSON(snapshotDestPath, bundleSizes, { spaces: 2 });
+  await fs.mkdir(path.dirname(snapshotDestPath), { recursive: true });
+  await fs.writeFile(snapshotDestPath, JSON.stringify(bundleSizes, null, 2));
 
   // eslint-disable-next-line no-console
   console.log(`Bundle size snapshot written to ${snapshotDestPath}`);