-`Screen::get_width()` now accessed by associated constant `i.e Text80x25::WIDTH`.
-`Screen::get_height()` now accessed by associated constant `i.e Text80x25::HEIGHT`.
-`Screen::get_size()` now accessed by associated constant `i.e Text80x25::SIZE`.
-`Graphics320x200x256::new`, `Graphics640x480x16::new`, `Text40x25::new`, `Text40x50::new`, `Text80x25::new` and `ScreenCharacter::new` are now `const fn`.
-`Graphics320x200x256`, `Graphics640x480x16`, `Text40x25`, `Text40x50`, and `Text80x25` now derive `Copy` and `Clone`.