Hope to upgrade to JDK 21

[ferrymo]

By leveraging the virtual thread capability, we can make full use of CPU and memory resources, resulting in less resource consumption during runtime, thus enabling my outdated computer to last longer.

[lakernote]

I will create a JDK 21 branch later to implement this.

[ferrymo]

I will create a JDK 21 branch later to implement this.我稍后会创建一个JDK 21分支来实现这个功能。

Great, and atthe same time, it is also hoped that through skills, the UI/UX can be improved to ensure professionalism and sophistication: https://ui-ux-pro-max-skill.nextlevelbuilder.io/