ci: create GitHub release after publish

[joshuaellis]

Publishing from next now creates the v<version> tag and GitHub release, marked as a pre-release for beta versions. Until now both were made by hand after every publish.

The changesets action only creates per-package tags. It skips GitHub releases because CHANGELOG.md is gitignored in this repo.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 26ac8ed

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

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR