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/HTMLOrSVGElement.idl

@@ -0,0 +1,11 @@
+// https://html.spec.whatwg.org/#htmlorsvgelement
+interface mixin HTMLOrSVGElement {
+    [SameObject] readonly attribute DOMStringMap dataset;
+    attribute DOMString nonce; // intentionally no [CEReactions]
+
+    [CEReactions, Reflect] attribute boolean autofocus;
+    [CEReactions] attribute long tabIndex;
+    // FIXME: Support the optional FocusOptions parameter.
+    undefined focus();
+    undefined blur();
+};