Wishlist: Ability to publish precompiled artifacts into the package on npm.

[jordwalke]

What if esy first checked for matching hashes in yourPackage/.esy/store/ and reused the local artifacts if they were present. It could print out why it did/did not use the package's local artifacts in a helpful message. That way you could publish a package with prebuilt artifacts for things like ocaml/rebel.

This is just a stop gap because I think a better system wouldn't even require checking in artifacts into the package (it would be another tool ideally integrated into the package manager) but this should help us get some heavy things off the ground.

This is lower priority imho.