LibWeb: Support loading FontFaces constructed with binary data

Author: https://github.com/ADKaster
Commit: 60b3436ea3
Pull-request: https://github.com/SerenityOS/serenity/pull/24319

Userland/Libraries/LibWeb/HTML/EventLoop/Task.h

@@ -54,6 +54,9 @@ public:
         // https://w3c.github.io/permissions/#permissions-task-source
         Permissions,
 
+        // https://drafts.csswg.org/css-font-loading/#task-source
+        FontLoading,
+
         // !!! IMPORTANT: Keep this field last!
         // This serves as the base value of all unique task sources.
         // Some elements, such as the HTMLMediaElement, must have a unique task source per instance.