Added Itemsmanager

Items now can be stored. I wanna kill myself

Scripts/building_area.gd

@@ -45,7 +45,7 @@ func hide_preview():
 			buildTransparentPreivew.visible = true
 
 func place_object():
-	#is_placed = true
+	is_placed = true
 	#buildTransparentPreivew.visible = false
 	BuildManager.object_placed.emit(self.position)
 	self.queue_free()