feat(skill): 重构技能模块，新增技能前后摇动画和组件

- 新增技能前后摇动画资源及配置
- 添加技能组件(SkillCom, EndAnmCom)和视图组件
- 重构技能配置表，支持前后摇动画配置
- 删除旧版技能资源(prefab, boom目录)
- 调整技能预制体路径结构

assets/script/game/common/ecs/position.meta

@@ -1,12 +0,0 @@
-{
-  "ver": "1.2.0",
-  "importer": "directory",
-  "imported": true,
-  "uuid": "d2d775f5-1dc0-455e-89d7-4a17f43170e0",
-  "files": [],
-  "subMetas": {},
-  "userData": {
-    "compressionType": {},
-    "isRemoteBundle": {}
-  }
-}