Add interactive client terminal transport

crates/lazaret-linux/src/process.rs

@@ -1464,6 +1464,18 @@ pub fn exec_target(target: TargetCommand) -> io::Error {
         .exec()
 }
 
+/// Stops this process until the host resumes it.
+///
+/// # Errors
+/// Returns an error when the kernel refuses the stop signal.
+#[allow(clippy::disallowed_methods)]
+pub fn suspend_current_process() -> io::Result<()> {
+    Ok(rustix::process::kill_process(
+        rustix::process::getpid(),
+        Signal::STOP,
+    )?)
+}
+
 #[cfg(test)]
 mod tests {
     use std::cell::Cell;