Fix artifact download path in publish workflow

Download artifacts to packages/ directory instead of root directory
so dist files end up in the correct location for npm publish.

The artifacts structure is:
- core/dist/
- wrapper/dist/

And they need to be at:
- packages/core/dist/
- packages/wrapper/dist/

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

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

Author: dskvr

.github/workflows/publish-packages.yml

@@ -78,7 +78,7 @@ jobs:
         uses: actions/download-artifact@v4
         with:
           name: built-packages
-          path: .
+          path: packages
 
       - name: Install Dependencies
         run: pnpm install --frozen-lockfile --ignore-scripts