Unify error handling, node req/res handling, and output

[adrianbenavides]

• [x] Develop a set of helpers to simplify commands logic (PR)
• [ ] Apply to configuration commands
• [ ] Apply to enroll commands
• [x] Apply to forwarder commands
• [ ] Apply to identity commands
• [ ] Apply to message commands
• [ ] Apply to node commands
• [x] Apply to project CRUD commands
• [ ] Apply to project enroller/member/credential commands
• [x] Apply to secure_channel commands
• [ ] Apply to secure_channel_listener commands
• [ ] Apply to service commands
• [x] Apply to space commands (PR)
• [ ] Apply to tcp commands
• [ ] Apply to vault commands
• [ ] Create async runtime at the top level and remove the node_rpc + rpc functions from all commands and just call the run_impl method

[RajivTS]

@mrinalwadhwa I would like to apply the new request handling pattern to identity commands if that's ok?

[mrinalwadhwa]

@RajivTS that would be great! Let us know if you have any questions.

[adrianbenavides]

@RajivTS I've created separated issues with reduced scope for the identity commands, in case you want to check them out:

• https://github.com/build-trust/ockam/issues/3562
• https://github.com/build-trust/ockam/issues/3561

I'm closing this issue for now.