v2 API

[sotetsuk]

envs

• animal_shogi
• backgammon
• bridge_bidding
• chess
• connect_four
• gardner_chess
• go
• hex
• kuhn_poker
• leduc_holdem
• othello
• play2048
• shogi
• sparrow_mahjong
• tic_tac_toe
• minatar

API tests

• usage1: key=key for deterministic env (redundant but ok)
• usage2: key=None for deterministic env (ok)
• usage1: key=key for stochastic env (ok)
  • no error
  • different key gives different results
  • same key gives same results
• usage3: key=None for stochastic env (wrong)

[codecov]

Codecov Report

Merging #1058 (d6c633a) into main (b91afce) will decrease coverage by 0.05%.
The diff coverage is 99.44%.

❗ Current head d6c633a differs from pull request most recent head 502f9a6. Consider uploading reports for the commit 502f9a6 to get more accurate results

@@            Coverage Diff             @@
##             main    #1058      +/-   ##
==========================================
- Coverage   87.61%   87.56%   -0.05%     
==========================================
  Files          54       54              
  Lines        5918     5913       -5     
==========================================
- Hits         5185     5178       -7     
- Misses        733      735       +2     

Files	Coverage Δ
pgx/__init__.py	100.00% <100.00%> (ø)
pgx/_src/api_test.py	98.95% <100.00%> (+0.12%)	⬆️
pgx/_src/visualizer.py	83.20% <100.00%> (ø)
pgx/animal_shogi.py	99.00% <100.00%> (-0.01%)	⬇️
pgx/backgammon.py	99.06% <100.00%> (-0.02%)	⬇️
pgx/bridge_bidding.py	82.42% <100.00%> (ø)
pgx/chess.py	99.50% <100.00%> (-0.01%)	⬇️
pgx/connect_four.py	97.59% <100.00%> (-0.03%)	⬇️
pgx/core.py	70.22% <100.00%> (ø)
pgx/gardner_chess.py	99.30% <100.00%> (-0.01%)	⬇️
... and 11 more

... and 3 files with indirect coverage changes