feat(战斗系统): 调整格挡子弹伤害计算和动画时长

修改格挡子弹的伤害计算方式，现在会基于子弹基础伤害计算
调整格挡动画的时长从0.27秒增加到0.5秒
降低乾坤剑基础伤害从35点降至20点
新增伤害描述说明乾坤剑伤害基于化解伤害值

components/Bullets/Parrier.tscn

@@ -5,7 +5,7 @@
 
 [sub_resource type="Animation" id="Animation_li4th"]
 resource_name = "spawn"
-length = 0.27
+length = 0.5
 step = 0.01
 tracks/0/type = "bezier"
 tracks/0/imported = false
@@ -15,8 +15,8 @@ tracks/0/interp = 1
 tracks/0/loop_wrap = true
 tracks/0/keys = {
 "handle_modes": PackedInt32Array(0, 0),
-"points": PackedFloat32Array(1, -0.25, 0, 0.1, 0, 0, -0.27, 0, 0, 0),
-"times": PackedFloat32Array(0, 0.27)
+"points": PackedFloat32Array(1, -0.25, 0, 0.1, 0, 0, -0.5, 0, 0, 0),
+"times": PackedFloat32Array(0, 0.5)
 }
 
 [sub_resource type="Animation" id="Animation_ksxds"]