Function update

update(
    world: World,
    character: KCC,
    deltaTime: number,
    gravity: Vec3,
    settings: UpdateSettings,
    listener: CharacterListener | undefined,
    filter: filter.Filter,
): void
Main update function - moves character with full collision handling.

This is the recommended function for updating character movement. It includes:
1. Contact tracking (added/persisted/removed callbacks)
2. Velocity cancellation toward steep slopes
3. Core movement with collision resolution (via move())
4. Floor sticking when leaving slopes
5. Stair walking when blocked by steep surfaces
Parameters
- world: World
  the physics world
- character: KCC
  the character controller
- deltaTime: number
  time step in seconds
- gravity: Vec3
  gravity vector
- settings: UpdateSettings
  update settings (stair walking, floor sticking)
- listener: CharacterListener | undefined
  optional listener for callbacks
- filter: filter.Filter
  collision filter
Returns void
- Defined in src/character/kcc.ts:3762