Move umbraco views to static assets and make that an RCL + Embedded language files (#12324)

* RCL for static assets to replace the nuspec

* Fix build

* Fix unit tests

* clean up in build.ps1

* Removed test (lang files will be removed later anyway)

* Fixed namespaces.. + Ensure we set web root path if missing (e.g. wwwroot folder do not exist) + Added StaticWebAssetBasePath

* fixed namespace

* cleanup

* Set root variable

* Added static assets

* Experimenting with StaticWebAssetBasePath

* Embedded lang files into Umbraco.Core

* Removed legacy test. New test can be implemented instead

* Fixed tests

* clean up

* Fix merge issue

templates/UmbracoProject/UmbracoProject.csproj

@@ -25,6 +25,10 @@
         <CopyRazorGenerateFilesToPublishDirectory>true</CopyRazorGenerateFilesToPublishDirectory>
     </PropertyGroup>
 
+  <ItemGroup>
+    <Folder Include="wwwroot" />
+  </ItemGroup>
+
     <!-- Keep this as false if ModelsBuilder mode is InMemoryAuto -->
     <PropertyGroup>
         <RazorCompileOnBuild>false</RazorCompileOnBuild>