Document release notes procedure

[GitHK]

Adds documentation how to handle the release notes.
It is important that the procedure is written down, since it's the scrum master's responsibility to enforce it.
This also makes it easier to update.

I have tried to create as much automation as possible in order to aid the scrum master.

Bonus:

• upgraded old not working .pre-commit-config.yaml config
• updated user readme in scripts
• moved some code to the shared utils module inside scripts

TODOs:

• before committing run entire readme once

Related issues:

• closes Document current release-note-creation approach verbosely #1637

[pcrespov]

thx

1. please pass a spellchecker to the readme (and in general all the texts that you are also generating with the scripts) :-)
2. IMO some of the scripts (generating more instructions) are unnecessary, but ok :-)
3. i find the workflow a bit too manual which IMO reduces the changes to succeed ...

[pcrespov]

👍

[sanderegg]

ok, thanks