LibWeb: Convert the Location object to IDL

This includes:

- Moving it from Bindings/ to HTML/
- Renaming it from LocationObject to Location
- Removing the manual definitions of the constructor and prototype
- Removing special handling of the Location interface from the bindings
  generator
- Converting the JS_DEFINE_NATIVE_FUNCTIONs to regular functions
  returning DeprecatedString instead of PrimitiveString
- Adding missing (no-op) setters for the various attributes, which are
  expected to exist by the bindings generator

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
- * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
  * Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
  * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
  *
@@ -53,6 +53,7 @@
 #include <LibWeb/HTML/HTMLLinkElement.h>
 #include <LibWeb/HTML/HTMLScriptElement.h>
 #include <LibWeb/HTML/HTMLTitleElement.h>
+#include <LibWeb/HTML/Location.h>
 #include <LibWeb/HTML/MessageEvent.h>
 #include <LibWeb/HTML/NavigationParams.h>
 #include <LibWeb/HTML/Origin.h>
@@ -1667,7 +1668,7 @@ bool Document::is_active() const
 }
 
 // https://html.spec.whatwg.org/multipage/history.html#dom-document-location
-Bindings::LocationObject* Document::location()
+HTML::Location* Document::location()
 {
     // The Document object's location attribute's getter must return this Document object's relevant global object's Location object,
     // if this Document object is fully active, and null otherwise.
@@ -1675,7 +1676,7 @@ Bindings::LocationObject* Document::location()
     if (!is_fully_active())
         return nullptr;
 
-    return window().location_object();
+    return window().location();
 }
 
 // https://html.spec.whatwg.org/multipage/interaction.html#dom-document-hidden

Userland/Libraries/LibWeb/DOM/Document.h

@@ -339,7 +339,7 @@ public:
 
     JS::NonnullGCPtr<HTML::History> history();
 
-    Bindings::LocationObject* location();
+    HTML::Location* location();
 
     size_t number_of_things_delaying_the_load_event() { return m_number_of_things_delaying_the_load_event; }
     void increment_number_of_things_delaying_the_load_event(Badge<DocumentLoadEventDelayer>);

Userland/Libraries/LibWeb/DOM/Document.idl

@@ -19,6 +19,7 @@
 #import <HTML/HTMLElement.idl>
 #import <HTML/HTMLHeadElement.idl>
 #import <HTML/HTMLScriptElement.idl>
+#import <HTML/Location.idl>
 #import <Selection/Selection.idl>
 
 // https://dom.spec.whatwg.org/#document
@@ -28,7 +29,6 @@ interface Document : Node {
 
     boolean hasFocus();
 
-    // FIXME: These attributes currently don't do anything.
     [PutForwards=href, LegacyUnforgeable] readonly attribute Location? location;
     attribute USVString domain;