update github actions to commits (#19)

Merge pull request #4 from Shopify/modelimport

Update some Tracky assets

Add the ability to add an audio track as well

Fix scale of preview

Restart animation from frame 0 on record start

Fix some state bugs

Preview model node before placing it

Make sure clear button works properly with model node

Add support for importing usdz models

Add sample output

Update README.md

Update README.md

Update README.md

Better tutorial ordering