[FEAT] Pressing Intensity and Polars improvements

[UnravelSports]

This pull request accomplishes the following:

• Deprecated SoccerGraphConverter in favor of SoccerGraphConverterPolars. This will be removed in the future.
  • note: This currently means the Graph features are slightly different.
  • note: This means, for the time being, we have node_features_pl.py, edge_features_pl.py and adjacency_matrix_pl.py alongside the non-polars ones.
• Introduced unravel.soccer.PressingIntensity
• Removed necessity for Polars datasets to .load(). This is now called within __init__.
• Introduced settings dataclass into Polars datasets (BigDataBowlDataset and KloppyPolarsDataset).

class DefaultSettings:
    home_team_id: Union[str, int]
    away_team_id: Union[str, int]
    provider: Union[Provider, str]
    pitch_dimensions: Union[MetricPitchDimensions, AmericanFootballPitchDimensions]
    orientation: Orientation
    max_player_speed: float = 12.0
    max_ball_speed: float = 28.0
    max_player_acceleration: float = 6.0
    max_ball_acceleration: float = 13.5
    ball_carrier_threshold: float = 25.0

• Introduced Constant, Column and Group dataclasses to more easily track which columns we are using under the hood.

class Constant:
    BALL = "ball"

class Column:
    BALL_OWNING_TEAM_ID = "ball_owning_team_id"
    ....

class Group:
    BY_FRAME = [Column.GAME_ID, Column.PERIOD_ID, Column.FRAME_ID]
    ....

• Fixed Orientation.BALL_OWNING_TEAM messing up our velocity and acceleration calculations.
• Speed up Polars further by using unnest().
• Updated examples
• Updated tests