feat(code): width = block

[folke]

When opts.code.width = 'block'
With an optional opts.code.pad_right

[georgeguimaraes]

I really like this UI change as well :)

[folke]

@MeanderingProgrammer rebased on main.

[MeanderingProgrammer]

Thanks for the PR, changes make sense, just some minor things.

[folke]

I had to refactor the code a bit, since the Normal block on the right had a higher priority than the diagnostics and would cut them off.
Fixed by setting priority to 0 and by changing the thin border to only render up to width of the block when width = "block"

[MeanderingProgrammer]

Looks good, thanks for the details!

[folke]

Thank you for merging!
I also just merged the LazyVim PR, so markdown.nvim is now the default LazyVim renderer for the markdown extra :)