feat(角色): 添加猫头鹰角色MTY及其冲刺攻击能力

添加新角色MTY（猫头鹰）及其专属子弹MTYSprint
- 实现MTY角色的基本属性和AI行为
- 添加MTYSprint子弹类型及碰撞检测
- 在Wave.gd中添加MTY的生成配置
- 扩展BulletTool工具类添加查找最近子弹功能

components/Characters/MTY.tscn

@@ -1,6 +1,7 @@
-[gd_scene load_steps=6 format=3 uid="uid://b5ysxff1ujv4l"]
+[gd_scene load_steps=7 format=3 uid="uid://b5ysxff1ujv4l"]
 
 [ext_resource type="PackedScene" uid="uid://cvogxi7mktumf" path="res://components/Abstracts/EntityBase.tscn" id="1_8og84"]
+[ext_resource type="Script" uid="uid://b80jr04qpitly" path="res://scripts/Contents/Characters/MTY.gd" id="2_hjlm2"]
 [ext_resource type="Texture2D" uid="uid://cpaafqx7vf443" path="res://resources/characters/bird/mty.png" id="2_i2hh0"]
 
 [sub_resource type="SpriteFrames" id="SpriteFrames_hjlm2"]
@@ -24,6 +25,7 @@ radius = 37.0
 height = 126.0
 
 [node name="MTY" instance=ExtResource("1_8og84")]
+script = ExtResource("2_hjlm2")
 displayName = "猫头鹰"
 drops = Array[int]([0, 1, 3])
 dropCounts = Array[Vector2]([Vector2(2, 4), Vector2(2, 4), Vector2(1, 3)])