feat(runtimed): add --version flag to CLI (#699)

Users can now check the installed runtimed version with --version or -V. The version is automatically read from Cargo.toml and displayed in the help text.

Author: rgbkrk

crates/runtimed/src/main.rs

@@ -14,6 +14,7 @@ use runtimed::singleton::get_running_daemon_info;
 
 #[derive(Parser, Debug)]
 #[command(name = "runtimed")]
+#[command(version)]
 #[command(about = "Runtime daemon for managing Jupyter environments")]
 struct Cli {
     #[command(subcommand)]