fix: free disk space before npm publish to prevent ENOSPC

Build artifacts are ~4GB. GitHub Actions runners have ~14GB.
Downloading + unpacking + npm pack fills the disk.
Remove dotnet/android/ghc/boost (~10GB) before artifact download.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: anandgupta42

.github/workflows/release.yml

@@ -116,6 +116,11 @@ jobs:
       - name: Install dependencies
         run: bun install
 
+      - name: Free disk space for artifact download + npm publish
+        run: |
+          sudo rm -rf /usr/share/dotnet /usr/local/lib/android /opt/ghc /usr/local/share/boost
+          df -h /
+
       - name: Download all build artifacts
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
         with: