Refactor onboarding to single page

bottom navigation bar

lib/router/transitions/slide.dart

@@ -0,0 +1,61 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_animate/flutter_animate.dart';
+import 'package:go_router/go_router.dart';
+
+// class CustomSlideTransition extends CustomTransitionPage<void> {
+//   CustomSlideTransition({super.key, required super.child})
+//       : super(
+//           transitionDuration: const Duration(milliseconds: 250),
+//           transitionsBuilder: (_, animation, __, child) {
+//             return SlideTransition(
+//               position: animation.drive(
+//                 Tween(
+//                   begin: const Offset(1.5, 0),
+//                   end: Offset.zero,
+//                 ).chain(
+//                   CurveTween(curve: Curves.ease),
+//                 ),
+//               ),
+//               child: child,
+//             );
+//           },
+//         );
+// }
+
+CustomTransitionPage buildPageWithDefaultTransition<T>({
+  required BuildContext context,
+  required GoRouterState state,
+  required Widget child,
+}) {
+  return CustomTransitionPage<T>(
+    key: state.pageKey,
+    transitionDuration: 250.ms,
+    child: child,
+    transitionsBuilder: (context, animation, secondaryAnimation, child) =>
+        FadeTransition(
+      opacity: animation,
+      child: SlideTransition(
+        position: animation.drive(
+          Tween(
+            begin: const Offset(0, 1.50),
+            end: Offset.zero,
+          ).chain(
+            CurveTween(curve: Curves.easeOut),
+          ),
+        ),
+        child: child,
+      ),
+    ),
+  );
+}
+
+Page<dynamic> Function(BuildContext, GoRouterState) defaultPageBuilder<T>(
+  Widget child,
+) =>
+    (BuildContext context, GoRouterState state) {
+      return buildPageWithDefaultTransition<T>(
+        context: context,
+        state: state,
+        child: child,
+      );
+    };