Changes

tsk43: Refactors story exploration to integrate reusable pagination
logic
Replaces custom pagination with a shared `Paginated` class to centralize 
functionality. Updates `ExploreBean` and `Explore.xhtml` to streamline 
navigation, enhance maintainability, and correct typographical errors in
`availableGenres` and `availableThemes`. Creates method in service to 
count the number of filtered stories and adds tests to it.

tsk39: Integrates advanced pagination and search improvements for
stories
Refactors `StoryManagedBean` to use a reusable `Paginated` class, 
centralizing pagination logic. Enhances `search.xhtml` with dynamic page 
size, navigation controls, and updated search result display. Updates
`StoryService` to add counts for published and filtered stories,
alongside improved query logic. Adds and updates related tests.