make archive type serialize and deserialize

[wolfv]

This would be useful to serialize the rattler-build outputs.

[baszalmstra]

Maybe it helps to use: https://serde.rs/variant-attrs.html#rename_all ?

[wolfv]

@baszalmstra would you rather have them serialized as lowercase, or as tar.bz2 / conda? I don't have a strong preference.
I more or less need this in rattler-build, but we could also skip serializing this option in rattler-build.

[baszalmstra]

@baszalmstra would you rather have them serialized as lowercase, or as tar.bz2 / conda? I don't have a strong preference. I more or less need this in rattler-build, but we could also skip serializing this option in rattler-build.

I have no strong preference, but I think if you serialize this to yaml the most beautiful would be snake_case perhaps?

[baszalmstra]

This seems to already be integrated in #392