📦 NEW: Support halfmove and fullmove in fen

[ianagbip1oti]

Also:

• Tweaked 50 move dampening which was previously not working like was intended
• Switched to UHO Lichess book

sprt_equal-1  | --------------------------------------------------
sprt_equal-1  | Results of princhess vs princhess-main (8+0.08, 1t, 128MB, UHO_Lichess_4852_v1.epd):
sprt_equal-1  | Elo: 2.96 +/- 4.21, nElo: 4.93 +/- 7.02
sprt_equal-1  | LOS: 91.58 %, DrawRatio: 45.60 %, PairsRatio: 1.08
sprt_equal-1  | Games: 9400, Wins: 2366, Losses: 2286, Draws: 4748, Points: 4740.0 (50.43 %)
sprt_equal-1  | Ptnml(0-2): [147, 1081, 2143, 1203, 126], WL/DD Ratio: 0.74
sprt_equal-1  | LLR: 2.89 (-2.25, 2.89) [-5.00, 0.00]
sprt_equal-1  | --------------------------------------------------