feat: 添加新武器彩虹旗和紫水晶簇，调整饲料属性和数值

refactor: 重构子弹生成逻辑，支持分裂和折射效果

fix: 修复掉落物拾取范围和碰撞检测问题

style: 优化UI显示，添加武器品质和类型标签

docs: 更新字段描述，调整部分饲料名称和分类

perf: 优化数学工具函数，添加随机数处理工具

test: 调整波次生成逻辑，添加新敌人类型

build: 添加新资源文件和相关导入配置

scripts/Tools/QuickUI.gd

@@ -7,3 +7,12 @@ static func smallText(text: String, center: bool = true):
 	if center:
 		label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
 	return label
+static func graySmallText(text: String, center: bool = true):
+	var label = Label.new()
+	label.text = text
+	label.label_settings = LabelSettings.new()
+	label.label_settings.font_size = 12
+	label.label_settings.font_color = Color(0.6, 0.6, 0.6, 1)
+	if center:
+		label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	return label