feat(角色): 添加Gobo角色及相关资源

添加Gobo角色，包括武器、召唤物和治疗导弹功能
- 新增Gobo角色模型和动画资源
- 实现Gobo武器系统，可召唤Gobo单位
- 添加治疗导弹功能，Gobo受伤时会发射治疗友军
- 优化实体基础类，添加生命值初始化方法
- 修改子弹伤害判定逻辑，支持友军伤害设置

scripts/Contents/Summons/Gobo.gd

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+extends SummonBase
+class_name GoboSummon
+
+var percent: float = 0.0
+var healthSinceLastLaunch: float = 0
+
+func initHealth(maxHealth: float):
+	super.initHealth(maxHealth)
+	healthSinceLastLaunch = maxHealth
+
+func register():
+	fields[FieldStore.Entity.MOVEMENT_SPEED] = 1.5
+	healthChanged.connect(
+		func(newHealth):
+			if healthSinceLastLaunch - newHealth >= 1:
+				launch()
+				healthSinceLastLaunch = newHealth
+	)
+func ai():
+	var target = BulletTool.findClosetBulletCanDamage(position, get_tree(), self)
+	if is_instance_valid(target):
+		move(target.position - position)
+
+func launch():
+	for bullet in BulletBase.generate(
+		ComponentManager.getBullet("HealingMissle"),
+		self,
+		position,
+		position.angle_to_point(EntityTool.findClosetEntity(myMaster.position, get_tree(), isPlayer(), !isPlayer(), [self]).position)
+	):
+		if bullet is HealingMissleBullet:
+			bullet.baseDamage = health * percent * -1

scripts/Contents/Summons/Gobo.gd.uid

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+uid://cqax27sw0wlme