v11: Umbraco Marketplace replaces packages repo (#13371)

* add lang keys for marketplace

* remove old 'repo' page and deprecate related services

* add new view for Umbraco Marketplace

* optimise margin/padding for other tabs

* mark Our Repository constants as obsolete

* improve css path to iframe slightly with more aliases and classnames

* remove style qs

* update URL of Marketplace

* add ng-controller with utitlities for future PostMessage API

* rename marketplace loaded function

* remove iframe postmessage logic for time being

* add handling of dynamic querystring params

* assume url does not change

* Added support for additional parameters for marketplace

* Update src/JsonSchema/AppSettings.cs

Fix styling issue

Co-authored-by: Ronald Barendse <ronald@barend.se>

* Update src/Umbraco.Core/Configuration/Models/MarketplaceSettings.cs

Fix styling issue

Co-authored-by: Ronald Barendse <ronald@barend.se>

* Update src/Umbraco.Core/Configuration/Models/MarketplaceSettings.cs

Make comment more descriptive

Co-authored-by: Ronald Barendse <ronald@barend.se>

* Update src/Umbraco.Core/Constants-Marketplace.cs

Fix styling issue

Co-authored-by: Ronald Barendse <ronald@barend.se>

Co-authored-by: Bjarke Berg <mail@bergmania.dk>
Co-authored-by: Ronald Barendse <ronald@barend.se>

src/Umbraco.Core/Constants-PackageRepository.cs

@@ -5,6 +5,7 @@ public static partial class Constants
     /// <summary>
     ///     Defines the constants used for the Umbraco package repository
     /// </summary>
+    [Obsolete("This is no longer used and will be removed in Umbraco 13")]
     public static class PackageRepository
     {
         public const string RestApiBaseUrl = "https://our.umbraco.com/webapi/packages/v1";