Board analysis : switch between engines

[anthonyivol]

It would be great if we can select Leela Chess Zero rather than Stockfish in the board analysis section.
As LC0 implementation is closer to AlphaZero, that learned chess from self play, and SF is based on brute force and games table, it may be usefull and intersting to see difference between those engines, particularly on strategic choice and openings.

[TheYoBots]

Maybe related to this issue #5897

[anthonyivol]

Yes it does, thanks. I searched for "Leela" in the discussions section and found nothing, I missed the issue.

[dav1312]

You should already be able to use Leela with https://github.com/lichess-org/external-engine