ci: adding publish script

Futzing with publication patterns

:rocket:	This description was created by Ellipsis for commit d03522606b5f5d4d32b362222f32c3c0a93aa9be

Consolidate GitHub Actions workflow to a single job for bumping version and publishing pre-releases using release-please.

Key points:

Consolidate GitHub Actions workflow to a single publish-next-tag-version job in .github/workflows/npm-publish.yml.
Remove publish-next and publish-release jobs.
Use release-please to determine the next version.
Update package.json with the new version and publish with --preid=next.
Change actions/checkout to v2 and actions/setup-node to v2.
Set Node.js version to 20.
Remove unnecessary permissions and release triggers.

Generated with :heart: by ellipsis.dev

nomic-ai / ts-nomic