Refactor POI radio as an example

[hopeyen]

Added a GossipAgent module for an initial refactoring of GossipMessages and specific radio usages.

Factor POI radio related operations and event loop to /examples.

Plan to further refactor query function and parsing function when implementing more dynamic queries and radio payload buffers.

To spin up example instance of POI crosschecker radio: cargo run --example poi-crosschecker [boot]

[axiomatic-aardvark]

Awesome work 🔥 this is just how I imagined the interface between the sdk and Radio to look like 🚀
Just one thing - at the top of the the Radio's main.rs file rust-analyzer says "file not included in module tree", I assume it's an issue with the cargo workspaces configuration 🤔 it causes rust-analyzer to be dodgy in the file and not show all lints, also I can't seem to click through struct/function definitions to inspect them

[axiomatic-aardvark]

Also I think we should completely extract the poi-crosschecker as its own repo but that can be after this week

[hopeyen]

thanks for the feedback @axiomatic-aardvark !

I've added examples to the root Cargo.toml to include rust analyzer for the radio executable. It should now link you to things as you click.

• Running cargo run --example poi-crosschecker [boot] should spin up a radio instance.

I agree that we can have a separate repo for POI cross-checker, additionally I think it can still live as an example here (and the ping-pong example) without active maintenance