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

scripts/Contents/Weapons/Cogwheel.gd

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+@tool
+extends Weapon
+
+func update(to: int, origin: Dictionary, _entity: EntityBase):
+    origin["atk"] += 2 * to * soulLevel
+    origin["rotate"] += 1 * to * soulLevel
+    return origin
+func attack(entity: EntityBase):
+    var weaponPos = entity.findWeaponAnchor("normal")
+    for bullet in BulletBase.generate(
+        ComponentManager.getBullet("Cogwheel"),
+        entity,
+        weaponPos,
+        weaponPos.angle_to_point(get_global_mouse_position()),
+    ):
+        if bullet is CogwheelBullet:
+            bullet.initialRotate = readStore("rotate")
+            bullet.rotateSpeed = readStore("rotate")
+            bullet.baseDamage = readStore("atk")
+    return true

scripts/Contents/Weapons/Cogwheel.gd.uid

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+uid://nm2xleunwf4r