CLI-like output

[vladdeSV]

Enable colors with std.stdio's write family.

I tried implementing a feature like this once by overriding the toString() method for the TextStyle struct, which outputs as an ANSI escape code which sets the colors. This functionality, however, does not belong there.

One approach would be to add a function with the signature

string cli(TextStyle style);

where you could do the following in the standard writeln

writeln("Welcome ", TextStyle().bg(Color.yellow).cli(), "user", TextStyle().cli(), ".");

// alternatively
auto info = TextStyle().bg(Color.yellow).cli();
auto reset = TextStyle().fg(Color.initial).bg(Color.initial).cli();
writeln("Welcome ", info, "user", reset, ".");

[vladdeSV]

Alternatively, another approach could be to add completely new function, for example scone.writeln(...) which converts each argument which is a TextStyle to a string and calls the appropriate write function within itself.

[vladdeSV]

This would mean I could deprecate my own small project termcolor-d.

[vladdeSV]

This was implemented in a3896c7.

[vladdeSV]

Windows Terminal can handle RGB color output, but RGB in colors are disabled in Color.

This causes some conflict, and might be related to #66.