Options for different rules between white and black

[RainRat]

For instance, the option checkCounting in variants.ini, divided into checkCountingBlack and checkCountingWhite.

Look into whether other options make sense to separate, and wouldn't be possible just by giving black/white different pieces/FENs.

Suggestions for options:

• mandatoryPromotion Pychess Discord, #other-variants-and-playtesting, Ideas Man, 2024/04/11

Leave the code to parse the original option in place, but have it set both the black and white values(for brevity/compatibility), ie. "checkCounting=true" would set "checkCountingBlack=true" and "checkCountingWhite=true"

Based on suggestion from sm, FSF Discord, #development, 2024/04/24

[inversed-ru]

I really want extinctionPieceTypes and extinctionPieceCount to be color-specific (working on a variant that would benefit from this feature). Having different extinction rules could make for interesting asymmetric play.