feat: idm snooping (#71)

Implement IDM snooping, a new feature that lets you snoop on messages between guests and the host. The feature exposes the IDM packets send and receives
to the API, allowing kratactl to now listen for messages and feed them to a user for debugging purposes.

crates/krata/src/idm/mod.rs

@@ -1,3 +1,3 @@
 #[cfg(unix)]
 pub mod client;
-pub mod protocol;
+pub use crate::bus::idm as protocol;