indent stack

[kristopolous]

I think pushing and popping off an indent stack will help clean up the "space_left" and various related logics.

[kristopolous]

1. I can get the clean execvp working better - the goal is that I can do sd --exec zsh and then have escape keys, like with ssh to toggle off or on the markdown. The eventual goal here is to wire this up to litellm and turn this into a ai debug-buddy that, since it can inject input into the current context, can work across ssh boundaries.

2. I can work on getting glow-formatted stylesheet support which is a json format. This enables people to bring their favorite glow styles in

3. I can work on a richify like api, this one would enable IOStream or ByteStream and async/await or yield flows

Then there's just general maintenance which would be like

fixing the plugin system
stack based output (essentially things like

| * list |
don't really parse if you're doing re.match(r'^\s*[*]') unless you move along the beginning of the line as you go

or, I can say "this is done" and do something else with my time