Release v4.2.5

[sampoyigi]

This release introduces new middleware for guiding incomplete setups and improves file upload validation in the media manager.

Added

• Added a CheckInitialSetup middleware that redirects users to the setup flow when initial configuration is incomplete
• Added MIME type and extension-based validation for file uploads in the media manager

Fixed

• Restricted the CheckInitialSetup redirect logic to apply only to theme routes, preventing unintended redirects elsewhere

Changed

• Replaced getAllowedMimeTypes with extension-based validation for media file handling
• Added type hints and removed unused imports in the media manager for improved code clarity