Configure prettier to always use trailing comma

[Nifdee]

Pull Request Checklist

• [x] I have run yarn build to ensure that the project builds successfully.
• [ ] I have updated CHANGELOG.md with the necessary changes made in this pull request.

Description

Without this change, the automatic formatting on save would drop some commas that would get re-added by running yarn build. It also wasn't obvious which prettier extension I needed to install, so I added this one as a recommended extension for future people coming across this.

Related Issues

TODO

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Name	Status	Preview	Comments	Updated (UTC)
pattern-projector	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 14, 2024 7:53pm

[courtneypattison]

Thank you so much!