feat(角色): 添加狗角色音效和攻击冷却随机化

添加狗角色的受伤音效文件并配置导入设置
修改狗的攻击冷却时间为3000-5000毫秒随机值
调整狗角色的受伤音效播放几率为30%
为狗角色添加碰撞检测形状

resources/sounds/effect/doghurt.wav.import

@@ -0,0 +1,24 @@
+[remap]
+
+importer="wav"
+type="AudioStreamWAV"
+uid="uid://bu6kb41xpl0nx"
+path="res://.godot/imported/doghurt.wav-0322a0a86f79b0dbfa9fd53259197b96.sample"
+
+[deps]
+
+source_file="res://resources/sounds/effect/doghurt.wav"
+dest_files=["res://.godot/imported/doghurt.wav-0322a0a86f79b0dbfa9fd53259197b96.sample"]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop_mode=0
+edit/loop_begin=0
+edit/loop_end=-1
+compress/mode=2