Deep Github intergration - Releases

[alrik]

As a software maintainer I want to create and sync a release-notes page with github releases.

Relates to #40

ToDo:

• Research if github provides webhooks for release update events

Acceptance Criteria:

• There is a new option to sync a release-notes page with "github releases"

Nice to Have:

• Create release-notes.yml or CHANGELOG.md from github releases