feat(技能系统): 添加额外伤害和溅射伤害功能

在技能组件中新增ext_dmg和splash字段用于处理额外伤害和溅射伤害
修改技能创建和伤害计算逻辑以支持新功能

assets/script/game/skill/Skill.ts

@@ -29,7 +29,7 @@ export class Skill extends ecs.Entity {
         this.addComponents<SMoveDataComp>(SMoveDataComp);
     }
     load(startPos: Vec3, parent: Node, s_uuid: number, targetPos: Vec3,
-        caster:HeroViewComp,ext_dmg:number=0) {
+        caster:HeroViewComp,ext_dmg:number=0,splash:number=0) {
         const config = SkillSet[s_uuid];
         
         if (!config) {
@@ -93,6 +93,8 @@ export class Skill extends ecs.Entity {
         sDataCom.Attrs={...cAttrsComp.Attrs}
         sDataCom.s_uuid=s_uuid
         sDataCom.fac=cAttrsComp.fac
+        sDataCom.ext_dmg=ext_dmg
+        sDataCom.splash=splash
     }
 
     /** 模块资源释放 */