Add GitHub Action release workflow

[thewtex]

Once a pushed tag, this workflow should,

• [x] Generate release notes from utilities/release-notes.py.
• [ ] Create a GitHub Release from the tag, notes.
• [ ] Publish the npm package.

[thewtex]

Possible basis: https://github.com/softprops/action-gh-release

[thewtex]

@bnmajor we could use a similar approach to tensorboard-3d, but the build is flit publish vs python setup.py.