Add Deflate algorithm to Sprite Compression using ZLIB-NG

[ericoporto]

Alternative to #2114, without sources in the repository (fewer line changes) and using zlib-ng instead.

I prefer sources in the repository for small things, zlib-ng is quite huge though, so that's why it's not added - miniz though is small enough it makes more sense to add it.

It's expected that zlib-ng is slightly faster than miniz but the tradeoff is a bigger footprint. I haven't validated this affirmation!!!

[ivan-mogilko]

I'm not sure what to do with this, am I supposed to review and test both #2114 and this? Is there a reason why not use a ready 2114 implementation?

There's also a number of minor things in the new functions that I'd rather fix, because I did not expect to have them in the final variant, but I'd rather wait until one of the PR is merged, because it will be confusing to have these fixes applied in 2+ prs.

[ericoporto]

Sorry, I wasn't sure if you preferred sources in repository or external library, this was more to have alternatives.

I think I prefer the other one with sources in the repository because always there is something wrong in some platform that I need to fix - apparently zlib-ng already has a wrong ifdef for x86 MSVC when the build is static.

[ivan-mogilko]

I do not have a strong preference here, I was going to investigate options, but now since you took over this, then let's use the one that you think is more convenient, so long as it works everywhere.

[ericoporto]

I think I prefer the miniz route then but this is here as a reference if minds are changed.