Feature Request: Darkmode autoswitch/黑暗模式自动切换

[wangyz1997]

I want to create a new issue

• [x] Yes, I have read FAQ.
• [x] Yes, I have read Hexo Docs page.
• [x] Yes, I have read Hexo-theme-stun Docs.
• [x] And yes, I already searched for current issues and this did not help me.

Stun Information

Stun Version: 2.1.1

Hexo Version: 5.0.2

Platform: Windows

Browser: Chrome 84

Feature Request

首先非常感谢您制作的漂亮的主题与完善的文档，非常喜欢您的主题。 希望在下个版本可以加入一个自动切换黑暗模式的功能，可以读取浏览器或系统的设置，自动切换黑暗模式，并提供一个隐藏切换开关的选项，非常感谢。

Thank for your great theme. I am writing to request a darkmode autoswitch feature, which can get the darkmode settings from the browser(or system) and automatically switch to the dark mode. It would be better if the option for hiding the switcher could be provided.

[liuyib]

@wangyz1997 你好，这个功能会考虑添加。能给个 PR 最好了 🙌

Hello, this feature will be considered for adding. Best to give a PR