Bundled third-party asset for 3D Model Embed Block

Package: @google/model-viewer
Version: 4.2.0
Project: https://modelviewer.dev/
Source repository: https://github.com/google/model-viewer
Original package file: dist/model-viewer-umd.min.js
Local bundled file: public/vendor/model-viewer/4.2.0/model-viewer-umd.min.js
SHA-256: 777eef0e3f21f9a8137ee4a3cb4346f3acf0e4dea8dcc3bc84dfeade8b8bc1ad

This file is bundled unchanged from the upstream package distribution.
