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/DOMStringMap.idl

@@ -0,0 +1,9 @@
+// https://html.spec.whatwg.org/#domstringmap
+[Exposed=Window, LegacyOverrideBuiltIns]
+interface DOMStringMap {
+    getter DOMString (DOMString name);
+
+    // FIXME: Extended attributes are currently not applied to special operations.
+    [CEReactions] setter undefined (DOMString name, DOMString value);
+    [CEReactions] deleter undefined (DOMString name);
+};