[Go] Extract game logic functions

[sotetsuk]

1127

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (a92b32a) 88.10% compared to head (830f230) 88.11%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1130 +/- ## ========================================== + Coverage 88.10% 88.11% +0.01% ========================================== Files 60 60 Lines 5926 5933 +7 ========================================== + Hits 5221 5228 +7 Misses 705 705 ```

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