Add ACTUAL markdown support in notes and knowledge base

I just tried the 11 beta and I saw the new tools for editing text. 
It's better than before, but being used to writing Markdown on the go, this gives me the FosWiki vibes.
- I also tried to convert Markdown to HTML but even there, code block won't follow for example.

Proxmox implemented this a couple versions ago:
Simply writing this:
## Simple markdown heading
### This is so easy and effective

- Ok now a bullet list
- Easy again

```
Code block
```
Gives this 

It could be very nice to at least toggle a markdown mode for writing then display the "View mode" in html like GLPI does.... There's a project called Perlite that perfectly fits markdown pages to a static website :https://github.com/secure-77/Perlite

Then we could make documentation flow as we link with actual cases, hardware, tickets etc, without lifting our mouse so often....

Thank you