Create lib

[jayvdb]

Allow use of the pnpm structs by other projects

[simonbuchan]

I'm happy enough in principle, though this is still pretty raw code I crapped out in an evening, so the API will need some work to add flexibility for the uses people will probably have if they want to do more interesting things.

In particular, the workspace file code is very bare bones and not likely useful in practice, as you will want to have a concrete syntax tree to preserve formatting and comments.

That said, if perfect is the enemy of good, then good is the enemy of fine, I guess! A major version bump isn't a huge deal.

[jayvdb]

Thanks Simon. I agree. I expect that the lib here will be unstable for a while, or might even go nowhere. It is a start.

I found two open source pnpm lock file parsers, your one and https://github.com/phylum-dev/cli/blob/1229114ffdbc8f9082e305b7f66c5e6297e15fc5/lockfile/src/javascript.rs#L298 , and that group isnt publishing their code on crates.io . Maybe there are others.