Refactor Errors

[Fi3]

Refactor Errors

Errors in the low level crates are not well designed. That because it would have been much more effective to
design them when the low level crates are functionally complete tested and used in other crates.
So all the Error(s) in the project must be refactored.

• remove all the panic and unwrap #51
• remove all the TODOs #52 that means that each TODO is either:
  1. resolved
  2. removed
  3. transformed into github issues
• refactor the errors #78

Useful links

• http://sled.rs/errors.html

[rrybarczyk]

• roles-sv2-logic Some more roles-sv2-logic error handling #229
• framing-sv2 framing-sv2 Error Handling #227
• codec-sv2 Error handling for codec_sv2 + noise_sv2 #195
• binary-sv2 Error handling for codec_sv2 + noise_sv2 #195
• subprotocols, not too many places where this can error (@lorban is working on this)
• double check roles crates for potential error handling needs, but believe most unwraps are infallible
• double check examples are doing error handling properly