feat(skill): 添加彩色箭头技能资源及配置

- 新增红、蓝、绿三种箭头技能的prefab和动画资源
- 更新技能配置文件和英雄设置
- 调整水球技能物理参数
- 优化碰撞矩阵设置
- 修复动画时间精度问题

settings/v2/packages/project.json

@@ -19,8 +19,7 @@
     "designResolution": {
       "width": 720,
       "height": 1280
-    },
-    "downloadMaxConcurrency": 30
+    }
   },
   "fbx": {
     "legacyFbxImporter": {
@@ -40,12 +39,12 @@
       }
     ],
     "collisionMatrix": {
-      "0": 64,
-      "1": 20,
+      "0": 96,
+      "1": 52,
       "2": 74,
       "3": 36,
       "4": 66,
-      "5": 8,
+      "5": 11,
       "6": 21
     },
     "gravity": {