refactor: reorganize systems properly, move events to events.rs

src/events.rs

@@ -0,0 +1,14 @@
+use bevy_ecs::event::Event;
+
+use crate::systems::input::GameCommand;
+
+#[derive(Debug, Clone, Copy, Event)]
+pub enum GameEvent {
+    Command(GameCommand),
+}
+
+impl From<GameCommand> for GameEvent {
+    fn from(command: GameCommand) -> Self {
+        GameEvent::Command(command)
+    }
+}