refactor(BulletBase): 移除子弹注册方法并添加子子弹标记

移除所有子弹类中的register方法，将属性初始化移至其他位置
在BulletBase的trySplit和tryRefract方法中添加子子弹标记

scripts/Contents/Bullets/BossAttack/Bear/ArrowSeven.gd

@@ -11,9 +11,6 @@ var traceTime: float = 2000
 var forwardTime: float = 500
 var forwarded: bool = false
 
-func register():
-	speed = 1
-	baseDamage = 1
 func spawn():
 	myColor = allColor.gradient.sample(randf())
 	superlight.material = superlight.material.duplicate()

scripts/Contents/Bullets/BossAttack/Bear/ForeverRainbow.gd

@@ -4,9 +4,6 @@ extends BulletBase
 
 var myColor: Color
 
-func register():
-	baseDamage = 1
-	penerate = 1
 func spawn():
 	myColor = allColor.gradient.sample(randf())
 	setColor(myColor)

scripts/Contents/Bullets/BossAttack/Bear/LightGun.gd

@@ -6,12 +6,8 @@ extends BulletBase
 @onready var track: ShaderStage = $"%track"
 @onready var sword: Sprite2D = $"%sword"
 @onready var points: GPUParticles2D = $"%points"
-
 var myColor: Color
-func register():
-	speed = 1
-	baseDamage = 1
-	penerate = 1
+
 func spawn():
 	myColor = allColor.gradient.sample(randf())
 	track.material = track.material.duplicate()

scripts/Contents/Bullets/BossAttack/Bear/SunDance.gd

@@ -6,13 +6,8 @@ extends BulletBase
 @onready var leave2: Sprite2D = $"%leave2"
 @onready var leave3: Sprite2D = $"%leave3"
 @onready var leave4: Sprite2D = $"%leave4"
-
 var myColor: Color
 
-func register():
-	speed = 0
-	baseDamage = 1
-	penerate = 1
 func spawn():
 	myColor = allColor.gradient.sample(randf())
 	setColor(myColor)

scripts/Contents/Bullets/BossAttack/KukeMC/HeavyCrystal.gd

@@ -4,8 +4,6 @@ extends BulletBase
 
 var readyTime: float = 1000
 
-func register():
-	speed = 10
 func ai():
 	if timeLived() < readyTime:
 		PresetBulletAI.lockLauncher(self, launcher, true)