[SDK-4436] test: Migrate CI to GitHub Actions

[evansims]

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Description

This pull request replaces our current CircleCI continuous integration suite for auth0-react with a new workflow using GitHub Actions.

References

Please see internal ticket SDK-4436.

Testing

This pull request replaces our continuous integration suite with one built in GitHub's native Actions ecosystem. It aligns with other migrations taking place across our repositories.

Checklist

• [x] I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• [x] All active GitHub checks for tests, formatting, and security are passing
• [x] The correct base branch is being used, if not the default branch

[evansims]

Note that the existing "Code scanning results / CodeQL" may not pass as this pull request replaces it's YAML configuration; we'll force-merge after approval.