Allow AST-navigation of text

[schanzer]

Use CM.markText() for text range

[justinpombrio]

What is this issue about? We currently call .markText() on AST root nodes including their comments. Is this issue talking just about that, or something beyond that?

[schanzer]

It would be a nice feature to have nodes rendered without any decoration at all, such that they appear to be plain text - but all the nifty screen reader and keyboard navigation stuff still works.

Basically, “what if this project didn’t make me look at blocks at all ?”