Netcore: Align namespaces (#9801)

* Rename Umbraco.Core namespace to Umbraco.Cms.Core

* Move extension methods in core project to Umbraco.Extensions

* Move extension methods in core project to Umbraco.Extensions

* Rename Umbraco.Examine namespace to Umbraco.Cms.Examine

* Move examine extensions to Umbraco.Extensions namespace

* Reflect changed namespaces in Builder and fix unit tests

* Adjust namespace in Umbraco.ModelsBuilder.Embedded

* Adjust namespace in Umbraco.Persistence.SqlCe

* Adjust namespace in Umbraco.PublishedCache.NuCache

* Align namespaces in Umbraco.Web.BackOffice

* Align namespaces in Umbraco.Web.Common

* Ensure that SqlCeSupport is still enabled after changing the namespace

* Align namespaces in Umbraco.Web.Website

* Align namespaces in Umbraco.Web.UI.NetCore

* Align namespaces in Umbraco.Tests.Common

* Align namespaces in Umbraco.Tests.UnitTests

* Align namespaces in Umbraco.Tests.Integration

* Fix errors caused by changed namespaces

* Fix integration tests

* Undo the Umbraco.Examine.Lucene namespace change

This breaks integration tests on linux, since the namespace wont exists there because it's only used on windows.

* Fix merge

* Fix Merge

src/Umbraco.Core/Mapping/IMapDefinition.cs

@@ -1,4 +1,4 @@
-namespace Umbraco.Core.Mapping
+namespace Umbraco.Cms.Core.Mapping
 {
     /// <summary>
     /// Defines maps for <see cref="UmbracoMapper"/>.

src/Umbraco.Core/Mapping/MapDefinitionCollection.cs

@@ -1,7 +1,7 @@
 using System.Collections.Generic;
-using Umbraco.Core.Composing;
+using Umbraco.Cms.Core.Composing;
 
-namespace Umbraco.Core.Mapping
+namespace Umbraco.Cms.Core.Mapping
 {
     public class MapDefinitionCollection : BuilderCollectionBase<IMapDefinition>
     {

src/Umbraco.Core/Mapping/MapDefinitionCollectionBuilder.cs

@@ -1,7 +1,7 @@
 using Microsoft.Extensions.DependencyInjection;
-using Umbraco.Core.Composing;
+using Umbraco.Cms.Core.Composing;
 
-namespace Umbraco.Core.Mapping
+namespace Umbraco.Cms.Core.Mapping
 {
     public class MapDefinitionCollectionBuilder : SetCollectionBuilderBase<MapDefinitionCollectionBuilder, MapDefinitionCollection, IMapDefinition>
     {

src/Umbraco.Core/Mapping/MapperContext.cs

@@ -1,8 +1,7 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Linq;
 
-namespace Umbraco.Core.Mapping
+namespace Umbraco.Cms.Core.Mapping
 {
     /// <summary>
     /// Represents a mapper context.

src/Umbraco.Core/Mapping/UmbracoMapper.cs

@@ -3,9 +3,10 @@ using System.Collections;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
-using Umbraco.Core.Exceptions;
+using Umbraco.Cms.Core.Exceptions;
+using Umbraco.Extensions;
 
-namespace Umbraco.Core.Mapping
+namespace Umbraco.Cms.Core.Mapping
 {
     // notes:
     // AutoMapper maps null to empty arrays, lists, etc