moving standalone mode to alsa rust direct binding crate & moving led_driver to a specific package

lightsabre_backend/system/src/main.rs

@@ -0,0 +1,10 @@
+use lightsabre_backend::LightSabre;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    env_logger::init();
+    // let mut scheduler = statemachine::Scheduler::new(statemachine::ExecModeTest::new())?;
+    // scheduler.start()
+    let ls = LightSabre;
+    ls.setup().run().wait();
+    Ok(())
+}