Add fonts directory to file paths (WordPress#633)

The Playground resolves URLs based on their path to determine whether to load
the resource at the URL or reroute it to its in-memory storage, such as for
themes and plugin content.

In WordPress 6.4, user-uploaded fonts will be stored in a new top-level uploads
directory and the Playground will need to support this. Otherwise, the Font
paths won't resolve properly and the Playground will return 404 errors for
them.

packages/playground/remote/src/lib/is-uploaded-file-path.ts

@@ -3,6 +3,7 @@ export const isUploadedFilePath = (path: string) => {
 		path.startsWith('/wp-content/uploads/') ||
 		path.startsWith('/wp-content/plugins/') ||
 		path.startsWith('/wp-content/mu-plugins/') ||
-		path.startsWith('/wp-content/themes/')
+		path.startsWith('/wp-content/themes/') ||
+		path.startsWith('/wp-content/fonts/')
 	);
 };