[Fix] Cluster Page - Githubissues

PR Summary

Enhancements to the FilamentShield.php file This file now has some updated features. Firstly, it has been configured to collect all the pages and their corresponding clusters. Secondly, some modifications have been made to the getPages method. Now it filters out pages that are associated with clusters. Lastly, the getEntitiesPermissions method has also been revamped. The new version removes duplicate entity permissions which improves performance and reduces redundancy.
Necessary modifications made to the HasPageShield.php file There are several key modifications to this file. The canView method was renamed to canAccess to better align with its functionality. Further, the return statement of shouldRegisterNavigation now checks canAccess instead of canView, considering this name change. Finally, removal of the original canView method was performed and modifications were made to canAccess, improving efficiency and clarity in the code.