fix compiler errors after some changes to game crate

examples/testbed/src/main.rs

@@ -206,7 +206,7 @@ async fn main() {
         Ok(())
     };
     let fps_plugin = move |game: &mut Game| {
-        let world = game.world();
+        let world = game.world_mut();
         world.add_resource(fps_counter::FPSCounter::new());
     };
 
@@ -228,7 +228,7 @@ async fn main() {
     };
 
     let jiggle_plugin = move |game: &mut Game| {
-        game.world().add_resource(TpsAccumulator(0.0));
+        game.world_mut().add_resource(TpsAccumulator(0.0));
         
         let mut sys = BatchedSystem::new();
         sys.with_criteria(FixedTimestep::new(45));
@@ -293,7 +293,7 @@ async fn main() {
             Ok(())
         }; */
 
-        let world = game.world();
+        let world = game.world_mut();
         world.add_resource(action_handler);
         world.spawn((Vec3::new(0.5, 0.1, 3.0),));
         game.with_plugin(InputActionPlugin);
@@ -303,7 +303,7 @@ async fn main() {
     let script_test_plugin = |game: &mut Game| {
         game.with_plugin(LuaScriptingPlugin);
 
-        let world = game.world();
+        let world = game.world_mut();
         let mut res_man = world.get_resource_mut::<ResourceManager>();
         let script = res_man.request::<LuaScript>("scripts/test.lua").unwrap();
         res_man.watch("scripts/test.lua", false).unwrap();

lyra-scripting/src/lib.rs

@@ -134,7 +134,7 @@ impl GameScriptExt for Game {
         T: ScriptHost,
         P: ScriptApiProvider<ScriptContext = T::ScriptContext> + 'static
     {
-        let world = self.world();
+        let world = self.world_mut();
         provider.prepare_world(world);
         let mut providers = world.get_resource_mut::<ScriptApiProviders<T>>();
         providers.add_provider(provider);

lyra-scripting/src/lua/system.rs

@@ -171,7 +171,7 @@ pub struct LuaScriptingPlugin;
 
 impl Plugin for LuaScriptingPlugin {
     fn setup(&self, game: &mut lyra_game::game::Game) {
-        let world = game.world();
+        let world = game.world_mut();
 
         world.add_resource_default::<TypeRegistry>();