[wip] Add CodeQL workflow

[bhongy]

Add CodeQL workflow as-is from https://github.com/formspree/formspree-js/actions/new?category=security.

CodeQL runs security analysis on the codebase.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 203b3d6

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

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Name	Status	Preview	Updated (UTC)
formspree-react-demo	✅ Ready (Inspect)	Visit Preview	Aug 1, 2023 4:45am

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.

[bhongy]

Note: this will run for typescript too. github/codeql-action#365