Add support for Flowchart and mermaid

[1984-git]

Current behavior

It seems that charts and diagrams (plus some other elements) are not displayed correctly. See the screenshot below.

Expected behavior

I guess they should be displayed correctly.

Steps to reproduce

1. Download the cheatsheet from here
2. Open it in Boostnote
3. Scroll down to see that items towards the end of the file are not displayed correctly.

Environment

• Boostnote version: 0.7.0
• OS version and name: Windows7

[Flexo013]

These are currently only supported by Boostnote Legacy and not by BoostNote.next.

[Flexo013]

See #371 for sequence diagrams.

[AntowaKartowa]

Damn. I have planty of notes with mermaid tree diagrams. That's the only obstacle stoping me from moving to BoostNote Next

[AntowaKartowa]

I am going to switch to Notable

[Komediruzecki]

I am going to switch to Notable

Hi Antowa,

sorry to hear that, I'll try to see if we can speed this up. I'll post here when those are implemented (hoping at the end of February)

Cheers

[egracens]

Noticed that mermaid diagrams are not working at boostnote.next and started searching why. Found this issue. This is very sad that there is still no mermaid support 😞

[AntowaKartowa]

Finally fixed. Hooray

[Komediruzecki]

Finally fixed. Hooray

Yes, hoping to more actively develop new features once cloud and local space come closer with shared components.

Sorry for waiting.