Function fill_rgb_buffer_simple

pub(crate) fn fill_rgb_buffer_simple<const BPP: usize>(
    buffer: &mut [u8],
    y_buffer: &[u8],
    u_buffer: &[u8],
    v_buffer: &[u8],
    width: usize,
    chroma_width: usize,
    buffer_width: usize,
)

Simple conversion, not currently used but could add a config to allow for using the simple