added enemy state machine with idle, stunned, and dead states

scripts/EnemyStates.gd

@@ -0,0 +1,24 @@
+extends State
+class_name EnemyState
+
+@export var enemy : CharacterBody3D
+@export var enemy_targets : Array[Area3D]
+@export var move_speed : float = 3
+
+func Enter():
+	if enemy_targets != null:
+		for target in enemy_targets:
+			target.body_part_hit.connect(take_damage)
+
+func take_damage(dam,bullet_damage):
+	SignalBus.emit_signal("enemy_hit")
+	enemy.health -= dam * bullet_damage
+	enemy.health_bar_sprite.visible = true
+	enemy.health_bar_sprite.health_update()
+	var number_spawn = enemy.damage_number.instantiate()
+	number_spawn.damage_amt = bullet_damage * dam
+	number_spawn.position = enemy.global_position + Vector3(0,2,0)
+	get_tree().get_root().add_child(number_spawn)
+	
+	if enemy.health <= 0:
+		Transitioned.emit(self,"die")