feat: add behaviour events from the simulation results

simulation/SimulationManager.gd

@@ -1,5 +1,8 @@
 extends Node
 
+signal npc_task_changed(npc: SimNPC, old_task: String, new_task: String)
+const DEBUG_LOGS := true
+
 var npcs: Array[SimNPC] = []
 var tick_interval := 1.0
 var tick_timer := 0.0
@@ -47,15 +50,21 @@ func simulate_tick() -> void:
 	print("--- Tick ", tick_count, " ---")
 
 	for npc in npcs:
+		var old_task := npc.current_task
 		npc.simulate_tick()
-		print(
-			npc.npc_name,
-			" | ",
-			npc.profession,
-			" | task: ",
-			npc.current_task,
-			" | hunger: ",
-			round(npc.hunger),
-			" | energy: ",
-			round(npc.energy)
-		)
+		
+		if old_task != npc.current_task:
+			npc_task_changed.emit(npc, old_task, npc.current_task)
+		
+		if DEBUG_LOGS:
+			print(
+				npc.npc_name,
+				" | ",
+				npc.profession,
+				" | task: ",
+				npc.current_task,
+				" | hunger: ",
+				round(npc.hunger),
+				" | energy: ",
+				round(npc.energy)
+			)