feat(game): 重构卡牌技能关联逻辑，调整游戏UI布局

为CardConfig新增skill字段，支持卡牌独立关联技能UUID
重构SCardComp与SkillBoxComp的技能获取逻辑，修复技能图标与配置读取问题，修正组件参数注释
调整GameSet中的游戏地平线坐标，优化多个场景与UI预制体的布局位置
移除部分预制体中的冗余配置项，清理无效代码

assets/script/game/map/SCardComp.ts

@@ -251,7 +251,8 @@ export class SCardComp extends CCComp {
             });
         });
 
-        const skill = SkillSet[this.card_uuid];
+        const s_uuid = this.cardData.skill ?? this.card_uuid;
+        const skill = SkillSet[s_uuid];
         const skillCard = CardPoolList.find(c => c.uuid === this.card_uuid);
         const card_lv = Math.max(1, Math.floor(this.cardData.card_lv ?? 1));
         const spSuffix = card_lv >= 2 ? "★".repeat(card_lv - 1) : "";
@@ -271,7 +272,7 @@ export class SCardComp extends CCComp {
         if (iconNode) {
             iconNode.setScale(new Vec3(1, 1, 1));
             this.clearIconAnimation(iconNode);
-            const iconId = skill?.icon || `${this.card_uuid}`;
+            const iconId = skill?.icon || `${s_uuid}`;
             this.updateIcon(iconNode, iconId);
         }
     }