Pipeline to upgrade demo's Propactive version on new releases

[u-ways]

It would be desirable to keep the demo project up to date with the latest release version. We can enforce this by developing a callable workflow that can be triggered whenever a new Propactive release version is published.

Requirements:

• Since it takes time for the plugin portal and Maven central index to update. The pipeline should instead create a PR that will be run against the current CICD and then merge once the build is green.
  • This also gives us the opportunity to fix any breaking changes for major releases.
  • Or add any more features to demo within the project for minor releases.
  • Add a PR template that should be used for the type of pull requests.
• A ticket should also be raised for Propactive project itself to add a workflow step to call the version-bumper workflow for the demo project on a new version release.
  • It should be done via a rest call, see How to trigger a Github action with an HTTP request.
  • Restrict access to who can initiate the workflow. (should be token-based)