feat(cli): enhance --version output with component versions

crates/irtt-client/src/lib.rs

@@ -47,6 +47,9 @@
 //!
 #![forbid(unsafe_code)]
 
+/// Cargo package version of this compiled library.
+pub const VERSION: &str = env!("CARGO_PKG_VERSION");
+
 #[cfg(feature = "tokio")]
 mod async_client;
 mod auth;