[ConnectFour] Extract `games/connect_four.py`

[sotetsuk]

1127

[codecov[bot]]

Codecov Report

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

Comparison is base (8420220) 88.10% compared to head (64adbf0) 88.10%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1153 +/- ## ======================================= Coverage 88.10% 88.10% ======================================= Files 63 64 +1 Lines 5996 5996 ======================================= Hits 5283 5283 Misses 713 713 ```

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