Introduced PakInfoPanel for displaying PAK archive contents, including new XAML and code-behind files. Updated Plugin.cs to use PakInfoPanel when opening .pak files, enabling preview and basic information display for Chromium resource packages.
Introduced PakExtractor for extracting resources from Chromium .pak files, including guessing file extensions. Updated Plugin.cs to recognize and begin handling .pak files, preparing for future integration into the viewer panel.
