* HighlightService was modified to support GetClassifiedSpansAsync method
* Updated Program.cs to pull in the proper location of the Json and ImageSharp extension projects
* Statiq must have changed how they are doing xrefs, so I adjusted those to be more specific with a few links
* Adding social card infrastructure
* Upgrades doc project to .NET 6
* Adds Playwright
* Changes the console to a web project for Playwright
* Adds social card template
* Added blog content
* Parallelized social image processing
* Updating CI to use .NET 6 for docs build