musketeer variant

[cross-of-north2]

Musketeer variant.
This PR is created instead of PR #772 which became invisible after my account (@cross-of-north) was flagged by GitHub.

[musketeerchess]

Hi @ianfab Have you tested the current PR? No conflicts apparently but this needs your experimented eye.
Hope you will find some free time to check this work and eventually merge with main Fairy Stockfish code. Thanks

[ianfab]

Not yet unfortunately. I have more time starting from this month, but it will still take weeks to months to catch up with the backlog I accumulated on this project in the last months, so I still have to ask for patience.

[musketeerchess]

Hi Fabian
Hope you are fine, hope also you'll have some free time to review the code.

Best regards

Zied

[ianfab]

Things are more or less going as expected. I have started to handle the backlog, but will still take months as the priority will be to get the last pending feature in the scope of the planned release scope done, and after the release I can start to address the new feature PRs.