refactor(config): 按照技能配置规范重构技能配置

1. 移除SkillSet中硬编码的buff效果，将6104技能替换为通用6101底座
2. 所有英雄/怪物技能通过overrides注入buff和数值修改
3. 新增项目技能配置规范文档

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

@@ -280,12 +280,7 @@ export const SkillSet: Record<number, SkillConfig> = {
         DTType: DTType.single, ap: 100, hit_count: 2, hitcd: 0.3, speed: 720, with: 90, ready: 0.2, EAnm: 0, DAnm: "", IType: IType.remote,
         RType: RType.linear, EType: EType.collision, info: "造成攻击力100%的伤害, 高阶技能",
     },
-    // DoT 技能：命中附加易伤（7002，受到伤害附加固定值，可被易伤抗性减免）
-    6104: {
-        uuid: 6104, name: "灼热火球", sp_name: "fb-1", icon: "Stat_FireDamage", TGroup: TGroup.Enemy, readyAnm: "", endAnm: "", act: "atk",
-        DTType: DTType.single, ap: 80, hit_count: 2, hitcd: 0.3, speed: 720, with: 90, ready: 0.2, EAnm: 0, DAnm: "", IType: IType.remote,
-        RType: RType.bezier, EType: EType.collision, timed_buff_id: 7002, info: "造成攻击力80%的伤害, 命中附加易伤(5秒内受到伤害附加固定值)",
-    },
+    // 6201 陨石术
     6201: {
         uuid: 6201, name: "陨石术", sp_name: "fb-3", icon: "Stat_Tripleshot", TGroup: TGroup.Enemy, readyAnm: "blues", endAnm: "", act: "max",
         DTType: DTType.aoe_grid, stun: 0, ap: 150, hit_count: 6, hitcd: 0.2, speed: 720, with: 0, ready: 0.2, EAnm: 0, DAnm: "", IType: IType.remote,