Implement minimal version of our RPC engine
Based on the design from !1061 (merged), let's come up with something that we can play with.
Necessary components will be:
-
A trivial client implementation (let's go with Rust here too) -
A small extensible server implementation of the framing and addressing parts. -
Basic server setup functionality (opening a pipe and handling messages) -
Connection-linking API in arti-client/tor-client? -
Basic commands (watch bootstrap status, open connection and link)