[Bug] Doesn't respect animateTransitions bool

[QasimXAli]

Description

So found a bug where it doesn't respect animateTransitions true when the firstPageProgressIndicatorBuilder is lets say a shimmer but the list is empty and it shows the default texts for no more items. it doesn't animate from firstPageProgressIndicatorBuilder child to no more items default no more items texts.

Package Version

4.0.0

Platform

Android, iOS

Code sample

Code sample

                      PagedSliverList(
                        pagingController: controller
                            .bookmarkArtPostPaginatedProvider.pagingController,
                        builderDelegate: PagedChildBuilderDelegate<String>(
                          animateTransitions: true,
                          itemBuilder: (context, artId, index) {
                            return BehaviorSubjectBuilder<ArtPost?>(
                                subject: controller.$artPostById(artId),
                                builder: (context, snapshot) {
                                  if (!snapshot.hasData) {
                                    return const SizedBox.shrink();
                                  }
                                  final artPost = snapshot.data!;
                                  return const Placeholder();
                                });
                          },
                          newPageProgressIndicatorBuilder: (context) =>
                              const CustomLoader(),
                          firstPageProgressIndicatorBuilder: (context) =>
                              Column(
                            children: List.generate(5, (index) {
                              return const ArtItemShimmerWidget();
                            }),
                          ),
                        ),
                      ),