refactor(资源加载): 将preload替换为load以优化内存使用

统一使用load方法动态加载资源，减少启动时的内存占用
移动Manager类到Tools/Managers目录下
修复DirTool处理remap文件的问题

scripts/Tools/DirTool.gd

@@ -3,15 +3,18 @@ class_name DirTool
 static func listdir(path: String) -> Array[String]:
 	var files: Array[String] = []
 	var dir = DirAccess.open(path)
+	if !path.ends_with("/"):
+		path += "/"
 	if dir:
 		dir.list_dir_begin()
 		var file_name = dir.get_next()
 		while file_name != "":
 			if file_name != "." and file_name != "..":
+				if file_name.get_extension() == "remap":
+					file_name = file_name.substr(0, len(file_name) - 6)
 				files.append(path + file_name)
 			file_name = dir.get_next()
 		dir.list_dir_end()
 		return files
 	else:
-		print("无法打开目录: ", path)
 		return []

scripts/Tools/Managers/ComponentManager.gd

@@ -0,0 +1,3 @@
+class_name ComponentManager
+
+var store = {}

scripts/Tools/QuickUI.gd

@@ -3,7 +3,7 @@ class_name QuickUI
 static func smallText(text: String, center: bool = true):
 	var label = Label.new()
 	label.text = text
-	label.theme = preload("res://themes/smallText.tres")
+	label.theme = load("res://themes/smallText.tres")
 	if center:
 		label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 	return label