Write production implementation of the brand refresh

[romaricpascal]

What

Implement the decision of #409, possibly on top of the branch from #408 and get the code ready for release

Why

So we can publish the brand refresh to users

Who needs to work on this

Developers

Who needs to review this

Developers, Designers

Done when

• Update adding the brand refresh to the tech_docs_gem is merged on main
• Possible new options are documented
• CHANGELOG has been updated