Structured changelog and sync with GitHub release notes

[tvercaut]

As a follow-up of #197, MONAI should provide structured changelogs.

A good practice for this (see e.g. NiftyNet), is to follow the keep a changelog recomendations.

A tool such as release-drafter or chandler can then be use to automate syncing information between the change log file and the GitHub release notes.

NiftyNet used chandler for this but chandler is no longer actively maintained and recomend to switch to release-drafter:
https://github.com/NifTK/NiftyNet/blob/dev/CONTRIBUTING.md#making-a-release
https://github.com/NifTK/NiftyNet/blob/dev/.gitlab-ci.yml

[tvercaut]

For the record, there is also a tool called gren :
https://github.com/github-tools/github-release-notes

gren also allows the automated creation of a CHANGELOG.md file from the release notes which apparently is not the case for release-drafter.

[wyli]

Github is providing some features for this https://docs.github.com/en/repositories/releasing-projects-on-github/automatically-generated-release-notes

[vikashg]

closing because of inactivity