Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibWeb/HTML/UniversalGlobalScope.idl

@@ -0,0 +1,17 @@
+#import <HTML/MessagePort.idl>
+
+// FIXME: Support VoidFunction in the IDL parser
+callback VoidFunction = undefined ();
+
+// https://whatpr.org/html/9893/webappapis.html#universalglobalscope-mixin
+interface mixin UniversalGlobalScope {
+    // base64 utility methods
+    DOMString btoa(DOMString data);
+    ByteString atob(DOMString data);
+
+    // microtask queuing
+    undefined queueMicrotask(VoidFunction callback);
+
+    // structured cloning
+    any structuredClone(any value, optional StructuredSerializeOptions options = {});
+};