hit sounds and general sound effects sys

src/main.rs

@@ -13,6 +13,7 @@ mod npc;
 mod platforms;
 mod player;
 mod shooting;
+mod sounds;
 mod squish_animation;
 mod tb_entities;
 
@@ -89,6 +90,7 @@ fn main() {
     app.add_plugins(squish_animation::plugin);
     app.add_plugins(cutscene::plugin);
     app.add_plugins(controls::plugin);
+    app.add_plugins(sounds::plugin);
 
     app.insert_resource(AmbientLight {
         color: Color::WHITE,