refactor: remove shuttle behaviour and send requests directly

[dariusc93]

What this PR does 📖

• remove the behaviour and send messages and request directly to shuttle, awaiting a response.
• add additional options to shuttle cli to configure wss certs and add external addresses
• remove redundant structs and traits

Which issue(s) this PR fixes 🔨

• relates to shuttle: Change internal protocol  #485

Special notes for reviewers 🗒️

Additional comments 🎤

• previously, we would have the protocol written in a low level state utilizing the request-response from libp2p, however due to the nature of the protocol and how we had to implement it, it created more complexity. This change allow us to send requests directly to the peer (in this case, a shuttle node) without the burden of maintaining the low level state and implementing communication via channels to the behaviour. Additionally, this change allow us to reduce the code base and simplify logic.
• messaging side will be redone in a separate PR to make it more seamless
• the protocol may change again but this initial change make it easier to switch and allows for backward compatibility if the change does happen.