Add multiple font support to `print`

This also adds a new font, the API changes are backwards compatible so it should be fine, I will also leave here a font converter from BDF to STM whatever.

use std::{iter, env, error::Error, io};
use itertools::Itertools;
use bdf;

const CHARSET: &[char] = &[' ', '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?', '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '{', '|', '}', '~'];

fn main() -> Result<(), Box<dyn Error>> {
	let name = env::args().nth(1).expect("no font name provided");
	let font = bdf::read(io::stdin())?;

	println!("#include \"fonts.h\"");
	println!("const uint8_t {name}_Table[] =", name = name);
	println!("{{");

	for (&ch, glyph) in CHARSET.iter().map(|ch| (ch, font.glyphs().get(ch).unwrap())) {
		println!();
		println!("\t// @{codepoint} {ch:?} ({width} pixels wide)",
			codepoint = ch as usize,
			ch = ch,
			width = glyph.width());

		for y in 0 .. glyph.height() {
			print!("\t");

			let mut draw = String::new();

			for bits in &iter::repeat(false).take(glyph.bounds().x as usize)
				.chain((0 .. glyph.width()).map(|x| glyph.map().get(x, y)))
				.chunks(8)
			{
				let mut bits = bits.collect::<Vec<_>>();
				if bits.len() < 8 {
					for _ in 0 .. 8 - bits.len() {
						bits.push(false);
					}
				}

				let byte = bits.into_iter()
					.rev().enumerate()
					.fold(0, |acc, (i, b)| acc | ((b as u8) << i));

				draw.push_str(&format!("{1:00$b}", glyph.width() as usize, byte));

				print!("0x{:02X}, ", byte);
			}

			println!("//{}", draw.replace("1", "#").replace("0", " "));
		}

		// Print the right amount of empty lines.
		for _ in 0 .. font.bounds().y.abs() + glyph.bounds().y {
			for _ in 0 .. (glyph.width() + glyph.bounds().x as u32) / 8 {
				print!("0x{:02X}, ", 0);
			}

			println!();
		}
	}

	println!("}};");
	println!();

	println!("sFONT {name} = {{ {name}_Table, {width}, {height} }};",
		name = name,
		width = font.bounds().width,
		height = font.bounds().height);

	Ok(())
}