Add Zstd support

[BioTurboNick]

What it says on the tin. I used Claude Code for this, checked on my own images. Seems straightforward enough.

[BioTurboNick]

I see there is some discussion in #173 about dependency strategy... but that's been untouched for 2 years. @mkitti

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.94%. Comparing base (9a5734a) to head (1e5d139).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #199      +/-   ##
==========================================
+ Coverage   92.93%   92.94%   +0.01%     
==========================================
  Files          15       15              
  Lines        1203     1205       +2     
==========================================
+ Hits         1118     1120       +2     
  Misses         85       85              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[tlnagy]

Thanks for the PR! We haven't really resolved the issues in #173 and while pure-Julia solutions are preferred, Zstd support would be nice. I haven't had time to refactor the package to use extensions which probably will be ideal long-term.

Could you add the example zstd tiff to https://github.com/tlnagy/exampletiffs? I like to keep the files out of the main TiffImages repo.

[tlnagy]

Thanks @BioTurboNick for the PR!

[mkitti]

I did start working on a pure-Julia version of Zstandard:

https://github.com/JuliaIO/Zstandard.jl

[BioTurboNick]

I did start working on a pure-Julia version of Zstandard:

https://github.com/JuliaIO/Zstandard.jl

I actually did too 😂 as an exercise in seeing what I could get Claude Code to do. We can compare notes sometime. https://github.com/BioTurboNick/ZstdInflate.jl