All assets to singleton

[huiyadanli]

所有存储识别素材体的类都继承单例，方便在不同中的任务中直接调用素材

public class Singleton<T> where T : class
{
    // 使用Lazy<T>确保线程安全的延迟初始化
    private static readonly Lazy<T> _instance = new(() => CreateInstanceOfT()!, isThreadSafe: true);

    public static T Instance => _instance.Value;

    // 保护的构造函数，防止直接实例化
    protected Singleton()
    {
    }

    private static T? CreateInstanceOfT()
    {
        return Activator.CreateInstance(typeof(T), true) as T;
    }
}