feat(武器): 增强红水晶武器爆炸效果

修改红水晶武器爆炸时生成的水晶碎片数量逻辑，从固定数量改为1~N随机数量
更新相关描述文本以反映新的随机数量机制

scripts/Contents/Weapons/RedCrystal.gd

@@ -5,7 +5,7 @@ class_name RedCrystalWeapon
 func update(to: int, origin: Dictionary, _entity: EntityBase):
 	origin["atk"] += 5 * to * soulLevel
 	origin["radius"] += 1 * to * soulLevel
-	origin["count"] = 1 * soulLevel
+	origin["count"] = 2 + 1 * soulLevel
 	origin["percent"] += 0.001 * to * soulLevel
 	return origin
 func attack(entity: EntityBase):
@@ -14,4 +14,6 @@ func attack(entity: EntityBase):
 		if bullet is RedCrystalBullet:
 			bullet.baseDamage = readStore("atk")
 			bullet.radius = readStore("radius")
+			bullet.percent = readStore("percent")
+			bullet.count = readStore("count")
 	return true