feat: 添加新的子弹类型和相关逻辑，更新角色攻击方式，增加无差别伤害选项

scripts/Contents/Bullets/Diamond.gd

@@ -2,6 +2,8 @@ extends BulletBase
 class_name Diamond
 
 func ai():
-	if Time.get_ticks_msec() - spawnInWhen < 500: # 生成的前0.5秒可以追踪
+	var tracing = Time.get_ticks_msec() - spawnInWhen < 1000
+	if tracing:
 		rotation = lerp_angle(rotation, position.angle_to_point(launcher.currentFocusedBoss.position), 0.1)
+	canDamageSelf = !tracing
 	forward(Vector2.from_angle(rotation))