feat(武器): 添加河豚刺针武器及其相关资源

新增河豚刺针武器，包含以下内容：
- 添加河豚武器图标和音效资源
- 实现Needle子弹类及其反弹逻辑
- 创建Hetun武器类实现散射攻击
- 添加子弹特效和碰撞检测
- 更新公鸡角色默认武器配置

resources/bullets/needle/1.svg

@@ -0,0 +1 @@
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="10.21088" height="147.52712" viewBox="0,0,10.21088,147.52712"><g transform="translate(-220.89456,-100.2385)"><g stroke="#cc9300" stroke-width="0" stroke-linecap="round" stroke-miterlimit="10"><g><path d="M226.0001,100.23851l5.10534,147.5l-10.21088,0.02299l5.10534,-147.5" fill="#805c00"/><path d="M226.04563,138.76964l3.77203,108.979l-7.54422,0.01699l3.77204,-108.979" fill="#ffb800"/><path d="M226.05478,163.26668l2.92324,84.45619l-5.84659,0.01316l2.92324,-84.45619" fill="#ffdb80"/><path d="M226.09683,190.70098l1.97382,57.02618l-3.94771,0.00889l1.97382,-57.02618" fill="#ffffff"/></g></g></g></svg><!--rotationCenter:19.105439999999987:79.761495-->

resources/bullets/needle/1.svg.import

@@ -0,0 +1,43 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://d4h0i65n0dveo"
+path="res://.godot/imported/1.svg-7d7231bb3b71752d763553e1d0f756c7.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://resources/bullets/needle/1.svg"
+dest_files=["res://.godot/imported/1.svg-7d7231bb3b71752d763553e1d0f756c7.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false