IDL: Add missing spec links

The only IDL interface without a spec link is Internals

Userland/Libraries/LibWeb/HTML/CanvasGradient.idl

@@ -1,3 +1,4 @@
+// https://html.spec.whatwg.org/#canvasgradient
 [Exposed=(Window,Worker)]
 interface CanvasGradient {
     // opaque object

Userland/Libraries/LibWeb/HTML/CanvasPattern.idl

@@ -1,3 +1,4 @@
+// https://html.spec.whatwg.org/#canvaspattern
 [Exposed=(Window,Worker)]
 interface CanvasPattern {
     // opaque object

Userland/Libraries/LibWeb/HTML/CloseEvent.idl

@@ -1,5 +1,6 @@
 #import <DOM/Event.idl>
 
+// https://websockets.spec.whatwg.org/#the-closeevent-interface
 [Exposed=*]
 interface CloseEvent : Event {
     constructor(DOMString type, optional CloseEventInit eventInitDict = {});

Userland/Libraries/LibWeb/HTML/CustomElements/CustomElementRegistry.idl

@@ -1,5 +1,6 @@
 #import <DOM/Node.idl>
 
+// https://html.spec.whatwg.org/#customelementregistry
 [Exposed=Window]
 interface CustomElementRegistry {
     [CEReactions] undefined define(DOMString name, CustomElementConstructor constructor, optional ElementDefinitionOptions options = {});

Userland/Libraries/LibWeb/HTML/DOMStringMap.idl

@@ -1,3 +1,4 @@
+// https://html.spec.whatwg.org/#domstringmap
 [Exposed=Window, LegacyOverrideBuiltIns]
 interface DOMStringMap {
     getter DOMString (DOMString name);

Userland/Libraries/LibWeb/HTML/ErrorEvent.idl

@@ -1,5 +1,6 @@
 #import <DOM/Event.idl>
 
+// https://html.spec.whatwg.org/#errorevent
 [Exposed=(Window,Worker)]
 interface ErrorEvent : Event {
     constructor(DOMString type, optional ErrorEventInit eventInitDict = {});

Userland/Libraries/LibWeb/HTML/HTMLAudioElement.idl

@@ -1,5 +1,6 @@
 #import <HTML/HTMLMediaElement.idl>
 
+// https://html.spec.whatwg.org/#htmlaudioelement
 [Exposed=Window, LegacyFactoryFunction=Audio(optional DOMString src)]
 interface HTMLAudioElement : HTMLMediaElement {
     [HTMLConstructor] constructor();

Userland/Libraries/LibWeb/HTML/HTMLDocument.idl

@@ -1,5 +1,6 @@
 #import <DOM/Document.idl>
 
+// https://html.spec.whatwg.org/#htmldocument
 [Exposed=Window]
 interface HTMLDocument : Document {
 };

Userland/Libraries/LibWeb/HTML/HTMLElement.idl

@@ -48,6 +48,7 @@ HTMLElement includes GlobalEventHandlers;
 HTMLElement includes ElementContentEditable;
 HTMLElement includes HTMLOrSVGElement;
 
+// https://html.spec.whatwg.org/#elementcontenteditable
 interface mixin ElementContentEditable {
     [CEReactions] attribute DOMString contentEditable;
     // FIXME: [CEReactions] attribute DOMString enterKeyHint;
@@ -55,6 +56,7 @@ interface mixin ElementContentEditable {
     // FIXME: [CEReactions] attribute DOMString inputMode;
 };
 
+// https://html.spec.whatwg.org/#htmlorsvgelement
 interface mixin HTMLOrSVGElement {
     [SameObject] readonly attribute DOMStringMap dataset;
     // FIXME: attribute DOMString nonce; // intentionally no [CEReactions]

Userland/Libraries/LibWeb/HTML/HTMLOptionsCollection.idl

@@ -2,6 +2,7 @@
 #import <HTML/HTMLOptionElement.idl>
 #import <HTML/HTMLOptGroupElement.idl>
 
+// https://html.spec.whatwg.org/#htmloptionscollection
 [Exposed=Window]
 interface HTMLOptionsCollection : HTMLCollection {
     // [CEReactions] attribute unsigned long length; // shadows inherited length

Userland/Libraries/LibWeb/HTML/MimeType.idl

@@ -1,5 +1,6 @@
 #import <HTML/Plugin.idl>
 
+// https://html.spec.whatwg.org/#mimetype
 [Exposed=Window]
 interface MimeType {
     readonly attribute DOMString type;

Userland/Libraries/LibWeb/HTML/MimeTypeArray.idl

@@ -1,5 +1,6 @@
 #import <HTML/MimeType.idl>
 
+// https://html.spec.whatwg.org/#mimetypearray
 [Exposed=Window, LegacyUnenumerableNamedProperties]
 interface MimeTypeArray {
     readonly attribute unsigned long length;

Userland/Libraries/LibWeb/HTML/NavigationTransition.idl

@@ -1,6 +1,7 @@
 #import <HTML/NavigationType.idl>
 #import <HTML/NavigationHistoryEntry.idl>
 
+// https://html.spec.whatwg.org/#navigationtransition
 [Exposed=Window]
 interface NavigationTransition {
   readonly attribute NavigationType navigationType;

Userland/Libraries/LibWeb/HTML/Plugin.idl

@@ -1,5 +1,6 @@
 #import <HTML/MimeType.idl>
 
+// https://html.spec.whatwg.org/#plugin
 [Exposed=Window, LegacyUnenumerableNamedProperties]
 interface Plugin {
     readonly attribute DOMString name;

Userland/Libraries/LibWeb/HTML/PluginArray.idl

@@ -1,5 +1,6 @@
 #import <HTML/Plugin.idl>
 
+// https://html.spec.whatwg.org/#pluginarray
 [Exposed=Window, LegacyUnenumerableNamedProperties]
 interface PluginArray {
     undefined refresh();

Userland/Libraries/LibWeb/HTML/PromiseRejectionEvent.idl

@@ -1,5 +1,6 @@
 #import <DOM/Event.idl>
 
+// https://html.spec.whatwg.org/#promiserejectionevent
 [Exposed=(Window,Worker)]
 interface PromiseRejectionEvent : Event {
     constructor(DOMString type, PromiseRejectionEventInit eventInitDict);

Userland/Libraries/LibWeb/HTML/Storage.idl

@@ -1,3 +1,4 @@
+// https://html.spec.whatwg.org/#storage-2
 [Exposed=Window]
 interface Storage {
 

Userland/Libraries/LibWeb/HTML/Worker.idl

@@ -1,6 +1,7 @@
 #import <DOM/EventTarget.idl>
 #import <DOM/EventHandler.idl>
 
+// https://html.spec.whatwg.org/#worker
 [Exposed=(Window)]
 interface Worker : EventTarget {
     constructor(DOMString scriptURL, optional WorkerOptions options = {});

Userland/Libraries/LibWeb/HTML/WorkerLocation.idl

@@ -1,3 +1,4 @@
+// https://html.spec.whatwg.org/#workerlocation
 [Exposed=Worker]
 interface WorkerLocation {
     stringifier readonly attribute USVString href;