⚡ Optimize go command parsing

[eduherminio]

Use regex capture groups.

[0, 5]

Score of Lynx-optimize-go-command-parsing-2157-win-x64 vs Lynx 2150 - main: 3173 - 3102 - 3865  [0.504] 10140
...      Lynx-optimize-go-command-parsing-2157-win-x64 playing White: 2141 - 1007 - 1922  [0.612] 5070
...      Lynx-optimize-go-command-parsing-2157-win-x64 playing Black: 1032 - 2095 - 1943  [0.395] 5070
...      White vs Black: 4236 - 2039 - 3865  [0.608] 10140
Elo difference: 2.4 +/- 5.3, LOS: 81.5 %, DrawRatio: 38.1 %
SPRT: llr -0.0456 (-1.6%), lbound -2.25, ubound 2.89

Almost passing [-5, 0], LGTM

>python3 sprt.py -w 3173 -l 3102 -d 3865 -e0 -5 -e1 0
ELO: 2.43 +- 5.31 [-2.88, 7.75]
LLR: 2.65 [-5.0, 0.0] (-2.94, 2.94)
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