Cap'n Proto Experiment

Experimentation with Cap'n proto rpc written in rust as a possible replacement for protocol buffers on the Hycon network.
Will be developed concurrently with the tokio implementation and benchmarked accordingly.

Project Outline

1. Create a basic rpc server and client wth a simple schema
2. Replace simple schema with schema derived from Hycon Network protocol buffers implementation
3. Benchmark against Tokio implementation and existing nodejs network