refactor: update providers to use keepAlive for enhanced state management

- Changed multiple provider annotations to `@Riverpod(keepAlive: true)` to improve state retention and management across the application.
- This update aligns with recent enhancements in state management practices, ensuring better performance and user experience throughout the app.

lib/core/services/animation_service.dart

@@ -212,7 +212,7 @@ class AnimationService {
 enum PageTransitionType { fade, slide, scale }
 
 /// Provider for reduced motion preference
-@riverpod
+@Riverpod(keepAlive: true)
 class ReducedMotion extends _$ReducedMotion {
   @override
   bool build() => false;