feat(战斗系统): 添加新武器"树"及其配套子弹和特效

实现新的近战武器"树"，包含以下内容：
- 添加武器Tree.gd脚本及场景资源
- 新增Parrier子弹类型，支持子弹碰撞检测和反弹效果
- 添加武器攻击音效和子弹命中特效
- 修改BulletBase.gd以支持子弹间碰撞逻辑
- 更新角色预设装备新武器

components/Characters/Rooster.tscn

@@ -1,8 +1,9 @@
-[gd_scene load_steps=20 format=3 uid="uid://dky8574uqc18r"]
+[gd_scene load_steps=21 format=3 uid="uid://dky8574uqc18r"]
 
 [ext_resource type="PackedScene" uid="uid://cvogxi7mktumf" path="res://components/Abstracts/EntityBase.tscn" id="1_e5pl8"]
 [ext_resource type="Script" uid="uid://cthtupc6dtbav" path="res://scripts/Contents/Characters/Rooster.gd" id="2_oqdqd"]
-[ext_resource type="PackedScene" uid="uid://c65tbxm3tclw0" path="res://components/Weapons/Hetun.tscn" id="3_da2ca"]
+[ext_resource type="PackedScene" uid="uid://cx7nogfnv7s8t" path="res://components/Weapons/Tree.tscn" id="3_0omr3"]
+[ext_resource type="PackedScene" uid="uid://c0n3igy4hucrg" path="res://components/Weapons/PurpleCrystal.tscn" id="4_0omr3"]
 [ext_resource type="AudioStream" uid="uid://cdrevrq7n6yqa" path="res://resources/sounds/effect/Boing.mp3" id="4_66s6c"]
 [ext_resource type="AudioStream" uid="uid://benyec5bqni0b" path="res://resources/sounds/effect/Chomp.wav" id="4_k0yme"]
 [ext_resource type="AudioStream" uid="uid://dmxh3bpk8vyy5" path="res://resources/sounds/effect/Coin.mp3" id="5_xnbhq"]
@@ -101,9 +102,16 @@ process_material = SubResource("ParticleProcessMaterial_joj4g")
 [node name="weaponStore" parent="." index="2"]
 process_mode = 4
 
-[node name="Hetun" parent="weaponStore" index="0" instance=ExtResource("3_da2ca")]
+[node name="PurpleCrystal" parent="weaponStore" index="0" instance=ExtResource("4_0omr3")]
+offset_left = 30.0
+offset_top = 20.0
+offset_right = 359.0
+offset_bottom = 370.0
 debugRebuild = false
 
+[node name="Tree" parent="weaponStore" index="1" instance=ExtResource("3_0omr3")]
+offset_bottom = 350.0
+
 [node name="sprint" parent="sounds" index="0"]
 stream = ExtResource("4_66s6c")