Better support ANSI escape codes

[pavelbraginskiy]

It's great that Set-PSReadlineOption -Colors supports ANSI escape codes on Unix systems. However, it could support them better. These codes support more than just colors.

For example, my Paramter color setting is:

`e[2;3;255;102m 

This sets not just color, but also makes the parameter italic. Unfortunatly, PSReadLine doesn't clear formatting between words, so every word after that parameter it also in italics.

The workaround is to put the Clear Formatting escape code (`e[0m) at the start of every single symbol type's color setting, which also means I have to use ANSI for every color setting.

A better solution would be for PSReadLine to automatically write `e[0m between words on Unix systems.

[ExE-Boss]

Maybe write `e[0m between words on all systems, since Windows is moving to using ANSI escape codes too.

[daxian-dbw]

This was fixed by #2925