Slide Kick

When a slide kick is happening:

1. If actionTimer > 30 or yPos - floorHeight > 500; Freefall
2. update_air_without_turn
3. switch perform_air_step():
   1. case AIR_STEP_NONE
      1. if actionState == 0, change angle
      2. break
   2. case AIR_STEP_LANDED
      1. if actionState != 0 or vel[1] >= 0; Slide Kick Slide
      2. else velocity is negative; set velocity to -velocity/2, actionState to 1, actionTimer to 0, play_mario_landing_sound and break
   3. case AIR_STEP_HIT_WALL, cap speed to 0, Backward Air Knockback
   4. case AIR_STEP_HIT_LAVA_WALL, change angle, make sure speed is at least 24, damage, Lava Boost

Slide Kick
Properties
Hex	0x018008AA
Action Flags	todo
Action Group	Airborne
ID	0x0AA
Transitions
Into	Freefall, Slide Kick Slide, Backward Air Kb, Lava Boost

(perform_air_step returns NONE if all quartersteps were cancelled)