feat: implement dash and wall run movement states for the player controller

movement/states/state_wall_run.gd

@@ -8,6 +8,7 @@ var params: MovementParams:
 var elapsed: float = 0.0
 var _initial_y_vel: float = 0.0
 var _run_speed: float = 0.0
+var _last_vel: Vector3 = Vector3.ZERO
 
 
 var _current_tangent: Vector3 = Vector3.ZERO
@@ -19,6 +20,7 @@ func enter(_data: Dictionary = {}) -> void:
 	# but preserve some if they just jumped onto it.
 	machine.player.velocity.y = minf(machine.player.velocity.y, 1.5)
 	machine.on_ground = false
+	_last_vel = machine.player.velocity
 
 	var hvel := Vector3(machine.player.velocity.x, 0.0, machine.player.velocity.z)
 	_current_tangent = machine.wall_normal.cross(Vector3.UP).normalized()
@@ -54,6 +56,12 @@ func update(delta: float) -> void:
 
 	var player := machine.player
 	var vel: Vector3 = player.velocity
+	
+	if vel.distance_squared_to(_last_vel) > 100.0:
+		machine.wall_normal = Vector3.ZERO
+		machine.wall_side = 0.0
+		machine.switch_to("air")
+		return
 
 	# ── Gradual gravity pull (starts light, increases over time) ──────────
 	var gravity_factor := 0.1 + 0.9 * (elapsed / params.wall_run_duration)
@@ -108,6 +116,7 @@ func update(delta: float) -> void:
 
 	player.velocity = vel
 	player.move_and_slide()
+	_last_vel = player.velocity
 
 	# ── Check still on wall ───────────────────────────────────────────────
 	var still_on_wall := machine.detect_wall_horizontal()