Moved the release notes to a better folder. This way we can have different release notes files and keep related content in a specific directory.
Pushed out the complexity around building the release notes into the buildSrc. In future I want to extract it into a completely separate library / gradle plugin.
Added a feature that allows ignoring certain issues from being visible in the release notes. Started adding some coverage for the release notes generation. I'm not sure if we want to completely hide certain issues from the report but this is a good start.