* rename `build-cli.yml` to `prepare-release.yml`
In other repo's we will also have a `prepare-release` so this makes it a
bit more consistent.
* use common CONSTANT_CASE for environment variables
* use `strategy` for defining the node version
* add script to get the release notes
* add release notes to release draft
* use CONSTANT_CASE for environment variables
* improve consistency for relase related scripts
