[Rust] Publish first version of the hacl crate

[franziskuskiefer]

Publish a first version of the hacl Rust bindings

• #379
• rename the crate to hacl #381
• update docs
  • fix links
  • build instructions
  • fix docs.rs build (no bindings generation)
• add the cryspen/hacl-core team to the maintainers of the crate
• publish the crate
• point the hacl-star crate to hacl