Buf.build Plugin for Rust

[alebar42]

What language does this apply to?

Rust 🦀 proto2, proto3 & editions

Describe the problem you are trying to solve.

Add a Rust plugin inline with other protocolbuffer plugins at:
https://buf.build/protocolbuffers/plugins

Describe the solution you'd like

https://buf.build/protocolbuffers/rust?version=v4.32.1

Describe alternatives you've considered

https://buf.build/community/neoeinstein-prost?version=v0.4.0

Additional context

Super happy you guys are officially supporting Rust 🦀