add: prototype key press checker

src/main.rs

@@ -1,12 +1,13 @@
-use std::io::Write;
+use std::{io::Write, thread::sleep};
 
 fn main() -> ! {
-    let mut d = pick_device();
+    let d = pick_device();
     println!("{}", d.name().unwrap_or("Unknown device"));
     loop {
-        for ev in d.fetch_events().unwrap() {
+        if d.get_key_state().unwrap().contains(evdev::Key::BTN_SIDE) {
-            println!("{:?}", ev);
+            println!("BTN_SIDE");
         }
+        std::thread::sleep(std::time::Duration::from_millis(100));
     }
 }