feat: enhance category management view with new features

- Refactored the CategoryView component to improve state management and data fetching for categories and tags.
- Introduced new functionality for selecting categories and tags, including mobile responsiveness.
- Added support for fetching posts by selected category and tag, enhancing the user experience in managing posts.
- Improved loading states and data handling for better performance and clarity.

These updates significantly enhance the functionality and usability of the category management interface.

Signed-off-by: Innei <tukon479@gmail.com>

Author: Innei