Separate Repo for ADR Website

[danielmackay]

CC: @GordonBeeming @jernejk

Currently, publishing Log4Brains creates a next.js website which is published to the gh-pages branch. While this is a simple option, it does open up the possibility of this brain being merged to main in which would be catestrophic.

Acceptance Critieria

1. Investigate if we should default to a branch or separate repo for the ADR website
2. If we stick to the current approach, document in the readme how to configure a separate repo for the ADR website.

[Hona]

You can publish to github pages without pushing to a branch - its the new suggested approach.

See more here https://github.com/actions/deploy-pages

I've done this on my own site also: https://github.com/Hona/VerticalSliceArchitecture.Documentation/blob/main/.github/workflows/deploy.yml