Convert PNG to PAA in hemtt-paa crate.

[ajmwagar]

Looking at the hemtt-paa crate, it looks like we're able to read paa's and convert them into PNG/JPEG files.

Would it be possible to add functionality for converting PNGs to PAA files on the fly?

[BrettMayson]

The blocker here is finding an implementation to use / port. The image crate being used right now only supports decoding, not encoding

[CiskaLV]

This might be of use here https://github.com/arma-tools/rvff