Kitty / Wezterm / iTerm2 / mintty and a few others already support base64 encoded gif/jpg/png, which are more space efficient, and easier to splat as b64 blobs

Kitty / Wezterm / iTerm2 / mintty and a few others already support base64 encoded gif/jpg/png, which are more space efficient, and easier to splat as b64 blobs than to dither and sixel-encode. Sixel needs to die.