ci, doc: add semver workflow and PR template

[ficcdaf]

Summary

This PR adds a GitHub actions workflow to automate the creation of semantically versioned releases with release-please and a PR template to encourage compliance with conventional commits.

Related Issues

Closes #828

Changes

• Added release-please workflow
• Added PR template
• Updated Contributing documentation to mention conventional commits

Checklist

I confirm that I have:

• Followed the
  Conventional Commits
  specification (e.g., feat: add new feature, fix: correct bug,
  docs: update documentation).
• My PR title also follows the conventional commits specification.
• Updated relevant documentation, if necessary.
• Thoroughly tested my changes.
• Added tests (if applicable) and verified existing tests pass with
  make test.
• Checked for breaking changes and documented them, if any.

[mrcjkb]

I'm not sure, but this might need a manifest to tell release-please about the initial version and which commit to bootstrap at.

[ficcdaf]

I'm not sure, but this might need a manifest to tell release-please about the initial version and which commit to bootstrap at.

Hmm, I believe release-please just starts with the latest release version. Ie as soon as the workflow is merged and it runs, it'll automatically process all the commits pushed since the last release and add them to the release PR; and it'll start keeping track of semver bumps from the last release onwards. So it won't try to calculate the version number from the start of the repo history, If that's what you're worried about.

Is this what you mean by telling it the initial version? (Thanks for your patience btw)

[kristijanhusak]

Generally looks good. Lets just fix these few comments and then we'll give it a try.

[ficcdaf]

Ok, I added the correct github token and changed the branch name to master

[kristijanhusak]

Ok, looks good. Let see how it goes.
Thanks!

[ficcdaf]

Thank you! I'm very excited to have contributed. I hope the workflow and the PR template helps to make maintaining the repo a bit easier. Thanks for your hard work on this plugin!