chore: simplify clean script for SWC migration

Remove obsolete lib/ directory deletion logic since packages now only
build to es/ directory with SWC. The script now:
- Deletes es/ for component packages (rebuilt on bootstrap)
- Preserves es/ for tooling packages (pre-built code needed for bootstrap)

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

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

Author: balzss

scripts/clean.js

@@ -74,12 +74,11 @@ async function clean() {
         path.join(packagesPath, packageDir.name, dir)
       )
 
-      if (!NODE_PACKAGES.includes(packageDir.name)) {
-        rmDirs.push(path.join(packagesPath, packageDir.name, 'lib'))
-      } else {
+      if (NODE_PACKAGES.includes(packageDir.name)) {
         // For tooling packages, don't delete 'es' directory (preserve pre-built code)
         rmDirs = rmDirs.filter(dir => !dir.endsWith('/es'))
       }
+      // Note: Component packages build to 'es/' which is included in DIRS_TO_DELETE
 
       return deleteDirs(rmDirs)
     })