refactor: 新增富文本描边工具并优化深色面板文案可读性

1. 新增RichOutline工具类，封装cc.RichText的outline标签包裹逻辑
2. 为所有道具/技能/英雄描述富文本添加黑色2px描边，提升深色背景下的可读性
3. 优化技能描述渲染逻辑：
   - 调整数值高亮色为更鲜亮的绿色
   - 使用罗马数字作为技能等级徽章
   - 移除升级预览弹窗的重复描述，改为当前/升级后双版本对比
   - 简化升级确认弹窗的格式排版
4. 调整道具/技能预制体的文字颜色为白色，适配深色面板

assets/script/game/map/ItemListComp.ts

@@ -20,6 +20,7 @@ import { CCComp } from "../../../../extensions/oops-plugin-framework/assets/modu
 import { CardConfig, CardTriggerType, CKind } from "../common/config/CardSet";
 import { EquipPoolList } from "../common/config/EquipSet";
 import { buildCardDescRich, buildEquipRich } from "../common/config/HeroSkillDesc";
+import { outlineRich } from "../common/RichOutline";
 import { oops } from "db://oops-framework/core/Oops";
 import { getCardIconId, setSpriteFrame } from "../common/CardIconHelper";
 import { GameEvent } from "../common/config/GameEvent";
@@ -172,7 +173,7 @@ export class ItemListComp extends CCComp {
             } else {
                 desc = this.cardData.info || "";
             }
-            this.info_rich.string = desc;
+            this.info_rich.string = outlineRich(desc);
             this.info_rich.node.active = !!desc;
         }