feat(skill): 调整技能提示的动画和样式

- 技能提示现在会短暂停留后垂直向上淡出，而非立即随机漂移
- 调整技能提示的位置、缩放和文本样式以改善视觉效果
- 移除技能提示的粗体样式，使整体显示更加协调

assets/resources/game/skill/buff/tooltip.prefab

@@ -2135,7 +2135,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 20,
+      "y": -20,
       "z": 0
     },
     "_lrot": {
@@ -2201,8 +2201,8 @@
     },
     "_lscale": {
       "__type__": "cc.Vec3",
-      "x": 1,
-      "y": 1,
+      "x": 0.8,
+      "y": 0.8,
       "z": 1
     },
     "_mobility": 0,
@@ -2257,7 +2257,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": -65.359375,
+      "x": -54.4580078125,
       "y": 0,
       "z": 0
     },
@@ -3982,7 +3982,7 @@
     },
     "_alignFlags": 10,
     "_target": null,
-    "_left": -15,
+    "_left": -8,
     "_right": 0.359375,
     "_top": 0,
     "_bottom": 0,
@@ -4031,7 +4031,7 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 100.71875,
+      "width": 92.916015625,
       "height": 29.2
     },
     "_anchorPoint": {
@@ -4080,7 +4080,7 @@
     "_isSystemFontUsed": true,
     "_spacingX": 0,
     "_isItalic": false,
-    "_isBold": true,
+    "_isBold": false,
     "_isUnderline": false,
     "_underlineHeight": 2,
     "_cacheMode": 0,