Add Ctl Socket, iterate on Idling daemon, update sysinfo crate, start on run menu

src/backend/brightness_control.rs

@@ -215,14 +215,19 @@ impl BackendThread<BrightnessMessage, Sender<BrightnessMessage>> for BrightnessM
             }
         });
         thread::spawn(move || {
+            let mut sleep_dur = 500;
             loop {
-                thread::sleep(Duration::from_millis(10_000));
+                if sleep_dur < 500 {
+                    sleep_dur += 1;
+                }
+                thread::sleep(Duration::from_millis(sleep_dur));
                 let mut messages = vec![];
 
                 for (monitor, data) in
                     &mut instance.lock().expect("Couldn't get lock").display_cache
                 {
                     if data.update() {
+                        sleep_dur = 50;
                         messages.push(BrightnessMessage::Value(monitor.clone(), data.value, false));
                     }
                 }