This replaces our JSON-based richtext diffing with HTML-based richtext diffing for lexical. It uses [this HTML diff library](https://github.com/Arman19941113/html-diff) that I then modified to handle diffing more complex elements like links, uploads and relationships. This makes it way easier to spot changes, replacing the lengthy Lexical JSON with a clean visual diff that shows exactly what's different. ## Before  ## After  