add base system

core/ai/ai_base/patrol_state.gd

@@ -0,0 +1,10 @@
+extends State
+
+@onready var agent: AIBase = owner
+
+func enter() -> void:
+	agent.navigate_to_random_point()
+
+func update(_delta)  -> void:
+	if agent.nav_agent.is_navigation_finished():
+		transitioned.emit(self, "idle")