Update import statements in hedging_preset.py to reflect new module structure. This change ensures proper access to small_field_preset and large_field_preset functions, enhancing code organization and maintainability.

Replace distribute_preset with hedging_preset to manage player exposure in lineup generation. Update app.py to reflect the new preset option and remove the obsolete distribute_preset function. This change enhances the flexibility of lineup strategies by allowing users to hedge against high-exposure players while maintaining performance metrics.