[Protocol] Add `TwoPlayerPerfectInfoGame`

[codecov[bot]]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (ec17c4d) 88.10% compared to head (a1b1480) 88.04%.

Files	Patch %	Lines
pgx/_src/games/__init__.py	64.70%	6 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1144 +/- ## ========================================== - Coverage 88.10% 88.04% -0.07% ========================================== Files 61 62 +1 Lines 5937 5954 +17 ========================================== + Hits 5231 5242 +11 - Misses 706 712 +6 ```

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