refactor(BulletBase/EntityBase): 重构子弹和实体属性系统

将子弹的fields属性拆分为独立的speed、damage和penerate变量
为所有子弹和实体添加register方法用于初始化属性
统一攻击冷却时间管理为attackCooldownMap
移除FieldStore中不再使用的Bullet相关枚举和映射

scripts/Contents/Bullets/Diamond.gd

@@ -3,6 +3,8 @@ class_name Diamond
 
 const traceTime = 2000
 
+func register():
+	damage = 2
 func ai():
 	rotation = lerp_angle(rotation, position.angle_to_point(launcher.currentFocusedBoss.position), 0.1 * clamp((traceTime - timeLived()) / traceTime, 0, INF))
 	canDamageSelf = !(timeLived() >= traceTime)