Add new routes for story-focused pages and update PackManager component

Commit notes

- Introduced new routes for story-focused pages: `/pack/:slug` and `/creator/:creatorId`. - Updated the PackManager component to reflect the new routing structure, including changes to link destinations. - Enhanced the MarketPage to link to creator profiles and updated button labels for clarity. - Added audio playback functionality in the StoryPackPage for sample previews, improving user interaction. - Cleaned up unused code in the LibraryPage for better maintainability.