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/HTMLSlotElement.idl

@@ -0,0 +1,20 @@
+#import <DOM/Element.idl>
+#import <DOM/Node.idl>
+#import <DOM/Text.idl>
+#import <HTML/HTMLElement.idl>
+
+// https://html.spec.whatwg.org/multipage/scripting.html#htmlslotelement
+[Exposed=Window]
+interface HTMLSlotElement : HTMLElement {
+
+    [HTMLConstructor] constructor();
+
+    [CEReactions, Reflect] attribute DOMString name;
+    sequence<Node> assignedNodes(optional AssignedNodesOptions options = {});
+    sequence<Element> assignedElements(optional AssignedNodesOptions options = {});
+    undefined assign((Element or Text)... nodes);
+};
+
+dictionary AssignedNodesOptions {
+    boolean flatten = false;
+};