feat: 实现DoT灼烧技能与debuff图标系统

本次提交完成了以下核心改动：
1.  调整fb-1~fb-6技能预制件的攻击偏移坐标，优化技能弹道位置
2.  新增DoT伤害机制，支持周期伤害/治疗的独立结算
3.  为Buff系统添加施法者属性快照，让DoT暴击、控制判定更准确
4.  新增顶栏debuff图标显示功能，支持灼烧等负面状态可视化
5.  为破晓先知等英雄替换为新的灼烧火球技能6104
6.  修复fb-2预制件的配置字段顺序与多余属性问题

assets/resources/game/skill/atk/fb-1.prefab

@@ -251,8 +251,8 @@
     "__prefab": {
       "__id__": 11
     },
-    "atk_x": 0,
-    "atk_y": 0,
+    "atk_x": 20,
+    "atk_y": 35,
     "runType": 0,
     "endType": 2,
     "speed": 720,

assets/resources/game/skill/atk/fb-2.prefab

@@ -181,7 +181,7 @@
     },
     "_type": 0,
     "_fillType": 0,
-    "_sizeMode": 1,
+    "_sizeMode": 0,
     "_fillCenter": {
       "__type__": "cc.Vec2",
       "x": 0,
@@ -389,11 +389,12 @@
     },
     "atk_x": 0,
     "atk_y": 0,
-    "_id": "",
     "runType": 0,
     "endType": 2,
     "speed": 720,
-    "time": 0
+    "time": 0,
+    "distance": 0,
+    "_id": ""
   },
   {
     "__type__": "cc.CompPrefabInfo",
@@ -508,4 +509,4 @@
     "instance": null,
     "targetOverrides": null
   }
-]
+]

assets/resources/game/skill/atk/fb-3.prefab

@@ -251,8 +251,8 @@
     "__prefab": {
       "__id__": 11
     },
-    "atk_x": 0,
-    "atk_y": 0,
+    "atk_x": 20,
+    "atk_y": 30,
     "runType": 0,
     "endType": 2,
     "speed": 720,

assets/resources/game/skill/atk/fb-4.prefab

@@ -251,8 +251,8 @@
     "__prefab": {
       "__id__": 11
     },
-    "atk_x": 0,
-    "atk_y": 0,
+    "atk_x": 20,
+    "atk_y": 30,
     "runType": 0,
     "endType": 2,
     "speed": 720,

assets/resources/game/skill/atk/fb-5.prefab

@@ -251,8 +251,8 @@
     "__prefab": {
       "__id__": 11
     },
-    "atk_x": 0,
-    "atk_y": 0,
+    "atk_x": 20,
+    "atk_y": 30,
     "runType": 0,
     "endType": 2,
     "speed": 720,

assets/resources/game/skill/atk/fb-6.prefab

@@ -251,8 +251,8 @@
     "__prefab": {
       "__id__": 11
     },
-    "atk_x": 0,
-    "atk_y": 0,
+    "atk_x": 20,
+    "atk_y": 30,
     "runType": 0,
     "endType": 2,
     "speed": 720,