implement font and text direction; call std and mock directly instead of importing

src/lib.rs

@@ -5,6 +5,7 @@ pub mod colour;
 pub mod dialogue;
 pub mod ending;
 pub mod exit;
+pub mod text;
 pub mod game;
 pub mod palette;
 pub mod image;
@@ -21,6 +22,7 @@ use colour::Colour;
 use dialogue::Dialogue;
 use ending::Ending;
 use exit::{Transition, Exit};
+use text::{Font, TextDirection};
 use game::Game;
 use palette::Palette;
 use image::Image;