Crates repository post-moderation

[carols10cents]

@Fiedzia

I believe Rust deserves to have well maintained, curated, rich standard library (or two: for things running on and without os). This boosts ecosystem tremendously, future-proofs your code, makes life easier for new users and has many other benefits. It does require maintenance though.

There was a proposal to create a Rust "platform" of a set of curated crates, and it got a lot of negative feedback from the community.