grpc/grpc-rust ? reverse-engineered prompt

Build me a Rust gRPC library and server client toolkit that feels production ready and easy to use.

I want the core to let me define services from protobuf files, generate Rust code, and then use async await to build both clients and servers over HTTP2. It should support the common gRPC stuff like streaming, metadata, TLS, health checks, and service reflection, and it should include a few working examples so I can see how to do a basic hello world, a streaming case, and a more complete route style demo.

Make it feel polished, with clear docs, tests, and a simple path for someone new to get started. If you need to check current Rust or protobuf docs online while wiring things up, do that.