refactor: 移除战斗结束相关的FEnd触发逻辑

此次提交全面清理了所有与战斗结束（FEnd）相关的代码：
1. 移除了Hero、Monster等实体中的fend属性与运行时处理
2. 删除了SkillTriggerHelper中的FEnd触发分支
3. 移除了GameEvent中的FightEnd事件与相关监听
4. 清理了配置文件中的FEnd相关枚举、字段与装备
5. 重构了MissionComp的回合逻辑，不再触发战后技能
6. 更新了注释与文档，移除过时的FEnd相关说明

彻底移除了已不再使用的战斗结束触发机制，简化了代码架构。

assets/script/game/common/config/EquipSet.ts

@@ -79,7 +79,6 @@ const EquipRawList: EquipRawData[] = [
     { uuid: 8811, card_lv: 3, icon: "Wand-FA_WP_Main_Wand_004_WoodGold", name: "召唤强化", info: "召唤触发技能次数+1", field: [{ uuid: 7014, value: 1 }] },
     { uuid: 8812, card_lv: 3, icon: "Staff-FA_WP_Main_Staff_005_WoodGold", name: "死亡强化", info: "死亡触发技能次数+1", field: [{ uuid: 7015, value: 1 }] },
     { uuid: 8813, card_lv: 3, icon: "Spear-FA_WP_Main_Spear_008_GrayGold", name: "开场强化", info: "战斗开始触发技能次数+1", field: [{ uuid: 7016, value: 1 }] },
-    { uuid: 8814, card_lv: 3, icon: "Blunt-FA_WP_Main_Blunt_006_OrangeGray", name: "结束强化", info: "战斗结束触发技能次数+1", field: [{ uuid: 7017, value: 1 }] },
     { uuid: 8815, card_lv: 3, icon: "Sword-FA_WP_Main_Sword_001_Gold", name: "攻击强化", info: "攻击触发技能次数+1", field: [{ uuid: 7018, value: 1 }] },
     { uuid: 8816, card_lv: 3, icon: "Shield-FA_WP_Sub_Shield_009_RedGold", name: "受击强化", info: "被攻击触发技能次数+1", field: [{ uuid: 7019, value: 1 }] },
     // 多词条装备