Move each ratings model class (and, for batters, the helper functions it
depends on) into a dedicated models.py so that calcs_*.py can import from
card_builder.py at module level without circular imports.
- batters/models.py: BattingCardRatingsModel + bp_singles, wh_singles,
one_singles, bp_homeruns, triples, two_doubles, hit_by_pitch, strikeouts,
flyout_a, flyout_bq, flyout_b, groundball_a, groundball_c
- pitchers/models.py: PitchingCardRatingsModel (no helper deps needed)
- batters/calcs_batter.py: imports model + build_batter_full_cards at top
- pitchers/calcs_pitcher.py: imports model + build_pitcher_full_cards at top
- batters/card_builder.py: imports from batters.models
- pitchers/card_builder.py: imports from pitchers.models
- tests/test_batter_calcs.py: import bp_singles, wh_singles from batters.models
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
