Feature Request: Real-Time Markdown Rendering in the Editor

[cyc1411881729-beep]

It would be great if Memos could support real-time Markdown rendering while editing a memo, similar to Typora.

Currently, Markdown syntax is only rendered after saving a memo. I would like to see the formatted content directly in the editor while typing, without having to save the memo first.

For example:

• Typing # Heading should display a large heading in the editor.
• Typing **bold text** should render the text in bold.
• Typing - item should display a bulleted list.
• Blockquotes, code blocks, links, and other Markdown syntax should also be rendered in real time.

Ideally, the editor would provide a WYSIWYG (What You See Is What You Get) experience while preserving Markdown compatibility.

This would make writing and organizing memos much more intuitive and efficient, especially for users who frequently use Markdown for daily notes and work logs.

Thank you for your great work on Memos!

[boojack]

refer to #6465