Add color preview

[Nemoumbra]

Discussed in #6147

^{Originally posted by Nemoumbra January 23, 2024}
I've seen that Ghidra can locate embedded media such as PNG images or WAV files in binaries and create special entities in the Listing view. Is there anything that can be used to preview the colors that look like that?

I expected to see a few builtin types such as RGBA, RGB565, etc.

There's also a Data Preview Window, but I think it can be used to preview the colors.