Avoid to use Arc for not Send/Sync reference

src/core/app/context.rs

@@ -1,4 +1,7 @@
-use std::sync::{Arc, RwLock};
+use std::{
+    rc::Rc,
+    sync::{Arc, RwLock},
+};
 
 use egui_winit_vulkano::Gui;
 use vulkano::{
@@ -35,19 +38,19 @@ pub struct ApplicationContext {
     pub window_id: WindowId,
 
     // Données mutables partagées avec Arc<Mutex<>>
-    pub vulkano_windows: Arc<RwLock<VulkanoWindows>>,
+    pub vulkano_windows: Rc<RwLock<VulkanoWindows>>,
     pub input_manager: Arc<RwLock<InputManager>>,
     pub timer: Arc<RwLock<Timer>>,
-    pub gui: Arc<RwLock<Gui>>,
+    pub gui: Rc<RwLock<Gui>>,
 }
 
 impl ApplicationContext {
     pub fn new(
         vulkan_context: Arc<VulkanContext>,
-        vulkano_windows: Arc<RwLock<VulkanoWindows>>,
+        vulkano_windows: Rc<RwLock<VulkanoWindows>>,
         input_manager: Arc<RwLock<InputManager>>,
         timer: Arc<RwLock<Timer>>,
-        gui: Arc<RwLock<Gui>>,
+        gui: Rc<RwLock<Gui>>,
         event_loop_proxy: EventLoopProxy<UserEvent>,
         window_id: WindowId,
     ) -> Self {