Support a full sizing for tools like neovim

[AM-I-Human]

Is your feature request related to a problem? Please describe.
When I run neovim, it run correctly, but inside a cell.
This cause a weird feeling because you have all the outer interface on it and you have the execution cells on the bottom

Describe the solution you'd like
Ideally will be nice to have a mode that enable a tmux/zellji workspace, maybe it can start with an extra button on top of a cell or an auto command for nvim.
Looking at Warp, it does something like this.

Here the screenshot of what its like. PS:nerdfonts are not supported yet #359 but I didn't change the font yet idk how to do it. #83

[AM-I-Human]

I solved the issue with nerd fonts by using /client:set termfontfamily="My Nerd Font Mono" I can see the nerd font, so it only need to patch the default font and you have something to start with. If needed I can provide the docker comand that I used (I have it on my other pc.)

[AM-I-Human]

I notice that the cursor is not visible