Image to OLED

Converts an ImageBuffer to a 128x64 SSD1306 OLED byte array

Example

let image_buffer: ImageBuffer<Rgb<u8>, Vec<u8>> =
    ImageBuffer::from_vec(2, 2, vec![30; 12]).unwrap();
// get bytes array, specifying the brightness threshold 
// as a number between 0 and 255
let byte_array = to_oled_byte_array(&image_buffer, 30);