Support for more text styles

[data-man]

Thank you for the nice project!

It would be cool to have more text styles available.
E.g. this is Wezterm's styles:
https://user-images.githubusercontent.com/1754269/167286003-9916a018-8d4d-457e-9515-a31192e8c965.mp4

Many other "modern" terminal emulators also support Overlined (SGR 53) and various underlines.

[ArthurSonzogni]

This sounds like a good idea!
I still would like to keep only things that are reasonably supported, or the ones we can query terminal's capability and implement fallback when unsupported.
At least, I would like to ensure support for xterm.js,, kitty, gnome-terminal and Microsoft's terminal.

Curly underline looks great!

[data-man]

Kitty, Alacritty, Contour, Wezterm support 4:* underlines.
I don't know about other TE.

According to https://github.com/microsoft/terminal/blob/main/src/renderer/atlas/AtlasEngine.h MS terminal should support dotted and double underlines:

https://github.com/microsoft/terminal/blob/dad68edc034e5e022b29881ea7e3af77b97c56a0/src/renderer/atlas/AtlasEngine.h#L395-L413