Collision Effects

Added

• Added a third-person splat toggle, with splats still always allowed in first person.
• Added a reset-to-defaults path and a much richer config screen with sliders, text fields, and dependent controls.

Changed

• Made ground proximity thresholds configurable instead of fixed.
• Split biome bonuses into separate swamp and jungle multipliers.
• Raised the splat cap from 50 to 100.
• Reworked config loading/saving from a simple key-value file into JSON, while still reading legacy configs.