ANSI colors and SGR parameters

[VincentCordobes]

First, thank you for this awesome lib!

What do you think of exposing ANSI colors and more SGR parameters like dim and italic ? https://docs.rs/crossterm/0.22.1/crossterm/style/enum.Color.html https://docs.rs/crossterm/0.22.1/crossterm/style/enum.Attribute.html

Also it would be great if the default style was the terminal colorscheme instead of black/white.