feat: handle code overflow

[mfontanini]

This makes it so that code blocks don't overflow to the right of the code block but instead how you'd expect them to: by creating a new line within the code block rect, properly colored and stuff.

Fixes #289

cc @DrunkenToast can you give this a shot? It seems to work well including line counts and all.

[DrunkenToast]

Woah, awesome! Didn't expect for this to be here so soon.

I did manage to break it however.
I am fairly sure this is simply because of the padding not being taken into account/incorrectly. Especially since it doesn't happen with output lines where there is no padding.

Examples:

Too small, goes outside box (2x padding):

Slightly too small, goes inside padding (1x padding):

Simply too much text (2x padding):

[mfontanini]

Nice, thanks! I see the issue, I'll need to shuffle some things around. Weird that I resized the screen so many times and never saw this.

[mfontanini]

Alright this is fixed. The only outstanding minor issue is when you shrink the window enough, the text will hit up to the code box's border. e.g. there won't be a 2 space padding at the end (see the the first long long... line in your first image). I can address this separately tho, as it's a smaller issue and this has been a bit of an annoying change.