Support for Milkdown

Milkdown lets you edit Markdown and preview changes in real-time without switching tabs. 
<img width="1228" alt="image" src="https://github.com/user-attachments/assets/8f15ccdf-38e4-4d09-8129-f538985c2420">


It would be great if the Desktop version could support this.

Original from: https://x.com/javayhu/status/1837682149324972218