`print{ln}!` macros

For quick usage it would be very useful to offer at least `stylish::ansi::println!` that wraps `stdout` and prints to it, currently that requires something like:

```rust
let stdout = std::io::stdout();
let io = stylish::io::ansi(stdout.lock());
writeln!(io, "{thing:s}")?;
io.finish()?;
```

or

```rust
println!("{}", stylish::ansi::format!("{thing:s}"));
```