feat(renderer2d)!: made text rendering return the bounds of the rendered text for better position control but also changed render_scene_2d signature to take a mutable Scene reference

crates/comet_app/src/app.rs

@@ -139,6 +139,11 @@ impl App {
         &self.scene
     }
 
+    /// Retrieves a mutable reference to the current `Scene` in the `App`
+    pub fn scene_mut(&mut self) -> &mut Scene {
+        &mut self.scene
+    }
+
     /// Retrieves a reference to the `InputManager`.
     pub fn input_manager(&self) -> &InputManager {
         &self.input_manager