Support tab based indentation

[nishith83]

Hey folks,

We recently started playing around with editorjs and must say the capabilities are strong.
However found a basic improvement which should go in editor (comparing with Notion):

• The editor should support tab based indentation. As far as I have played around, don't see this on the fly. Think from a writer's usability, this should be added

If there's a way to do it (not talking checklists/lists), let me know :)

[SilverTee]

Yes good idea, please support it 👍

[7ammer]

I see that tabs are supported in bullet points. There is an open issue in the checklists repo for tab based indentation: editor-js/checklist#33