Added state component

client/player/state/StateComponent.gd

@@ -0,0 +1,48 @@
+class_name StateComponent
+extends Node
+
+enum State {
+	None,
+	Idle,
+	Run,
+	Jump,
+	Fall,
+	Skill,
+}
+
+signal transitioned(from: State, to: State)
+
+var movement: MovementComponent
+var _current: State
+
+func _ready():
+	current = State.Idle
+	movement = owner.find_child("Movement")
+
+func _process(_delta):
+	if current == State.Skill:
+		return
+	
+	current = next_state()
+
+func next_state() -> State:
+	if movement.body.velocity.y > 0:
+		return State.Jump
+	elif movement.body.velocity.y < 0:
+		return State.Fall
+	elif movement.direction != Vector3.ZERO:
+		return State.Run
+	else:
+		return State.Idle
+
+## Current character state getter and setter.
+var current: State:
+	get:
+		return _current
+	set(new_state):
+		if _current == new_state:
+			return
+		
+		var old_state := _current
+		_current = new_state
+		transitioned.emit(old_state, new_state)