CLI for participating with iox2 communication from the terminal

[orecham]

Brief feature description

Make it possible to publish, subscribe, notify, listen (request, respond, etc.) to iceoryx2 services directly from the CLI, e.g.

iox2 service publish <TOPIC> <PAYLOAD>
iox2 service subscribe <TOPIC>
iox2 service listen <TOPIC>
iox2 service notify <TOPIC>
// etc.

Detailed information

Nice to have:

1. Make it possible to plug in custom logic for working with payloads, e.g.
   1. Publish data from a file
   2. Display image payloads from subscribers directly in the terminal