add ui module

src/ui.rs

@@ -0,0 +1,14 @@
+use std::process::exit;
+
+use std::io::Write::std::io;
+
+use std;
+
+pub(crate) fn get_user_confirmation() {
+    print!("Continue? [Y/n] ");
+    std::io::stdout().flush().unwrap();
+    let reply = std::io::stdin().lock().lines().next().unwrap().unwrap();
+    if !(reply.is_empty() || reply.to_lowercase().contains('y')) {
+        exit(0)
+    }
+}