Player.init> print a more meaningful message

Instead of printing 'Hello world', rcode::Player.init will now print 'rcode > Player'.

This update makes it clearer as to what is being init'd.

rcode/src/lib.rs

@@ -20,7 +20,7 @@ struct Player {
 #[godot_api]
 impl ISprite2D for Player {
     fn init(base: Base<Sprite2D>) -> Self {
-        godot_print!("Hello world!");
+        godot_print!("rcode > Player");
         Self {
             speed: 0.0,
             angular_speed: 0.0,