feat(武器): 添加齿轮回旋镖武器及其子弹效果

添加新的武器"齿轮回旋镖"及其配套子弹资源：
1. 实现齿轮武器的基本逻辑，包括攻击和属性计算
2. 添加齿轮子弹的旋转、减速和回旋行为
3. 包含相关资源文件（图片、场景、脚本）
4. 将新武器添加到公鸡角色的武器库中

resources/bullets/cogwheel/cogwheel.png.import

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