add human fbx and idle/walking animation

core/ai/agents/base/idle_state.gd

@@ -2,11 +2,13 @@ extends State
 
 const PATROL_STATE_ID: StringName = &"patrol"
 
+@onready var agent: AIBase = owner
 @export var wait_time: float = 3.0
 
 var runtime_timer: Timer
 
 func enter() -> void:
+	agent.run_idle_animation()
 	runtime_timer = Timer.new()
 	runtime_timer.name = "IdleTimer"
 	add_child(runtime_timer)