Upgrade Fancybox and enhance pattern previews

[ronalfy]

This release upgrades the Fancybox library to v6, bringing significant improvements to pattern previews and introducing new quick action capabilities:

• Fancybox Upgrade: Updates the @fancyapps/ui package to v6.1.14, along with necessary adjustments to import paths and usage patterns.
• Enhanced Pattern Previews:
  • Introduces an interactive toolbar directly within the Fancybox lightbox, providing quick actions for patterns, including:
    • Disabling/Enabling (for registered patterns)
    • Deleting (for local patterns)
    • Editing (for local patterns)
    • Exporting to JSON
    • Copying pattern block markup to the clipboard
  • Enables a gallery view for patterns, allowing users to navigate between multiple pattern previews using a carousel.
  • Resolves an issue with iframe preview scrolling within the lightbox for a smoother viewing experience.
  • Adjusts the styling of Fancybox captions for improved readability.
• Code Refinements:
  • Adds new utility functions (canonicalPatternId, patternIdsEqual) to standardize pattern ID handling across local and registered patterns.
  • Refactors components to utilize custom events for managing preview actions, enhancing modularity.
  • Adjusts z-index values to ensure WordPress modals correctly overlay the Fancybox previews.
  • Removes unused code and simplifies dependencies in various React components.