Add cli & lib crates

cli/src/util.rs

@@ -0,0 +1,24 @@
+use std::sync::mpsc as std_mpsc;
+use tokio::sync::mpsc as tokio_mpsc;
+use tokio::task;
+
+pub fn proxy_channel<T>(std_rx: std_mpsc::Receiver<T>) -> tokio_mpsc::Receiver<T>
+where
+    T: 'static + Send + Sync,
+{
+    let (tx, tokio_rx) = tokio_mpsc::channel(255);
+
+    task::spawn_blocking(move || loop {
+        let msg = match std_rx.recv() {
+            Ok(msg) => msg,
+            Err(_) => return,
+        };
+
+        match tx.blocking_send(msg) {
+            Ok(_) => {}
+            Err(_) => return,
+        }
+    });
+
+    tokio_rx
+}