ci: provide elements release by pull request

[BenPag]

Closes #710

Proposed Changes

• add new workflow which creates a pull request for releasing
• changed deploy version workflow to enable support for:
  • automatic tagging latest release commit
  • automatic creation of GitHub release

The GitHub release changelogs are generated base on semantic commits.

https://github.com/mathieudutour/github-tag-action#usage

Example release on my fork: https://github.com/BenPag/elements/releases/tag/v7.1.2