Add more packages

[JunTaoLuo]

Addressing a few packages left behind in #21

Packages to add:

• Microsoft.EntityFrameworCore.Tools,ship,exclude
• Microsoft.VisualStudio.Web.CodeGeneration,ship,exclude
• Microsoft.VisualStudio.Web.CodeGeneration.Contracts,ship,exclude
• Microsoft.VisualStudio.Web.CodeGeneration.Core,ship,exclude
• Microsoft.VisualStudio.Web.CodeGeneration.Design,ship,exclude
• Microsoft.VisualStudio.Web.CodeGeneration.EntityFrameworkCore,ship,exclude
• Microsoft.VisualStudio.Web.CodeGeneration.Templating,ship,exclude
• Microsoft.VisualStudio.Web.CodeGeneration.Utils,ship,exclude
• Microsoft.VisualStudio.Web.CodeGenerators.Mvc,ship,exclude

The Scaffolding packages cannot be added right now due to dotnet/roslyn#16040

[muratg]

@JunTaoLuo This package is the "runtime" part of the EF tool, right? (Not the actual tool...) In that case, approved.

[JunTaoLuo]

Scaffolding packages will be added to the .All metapackage only and will not be put into the runtime store. They are build time dependencies and are marked as PrivateAssets="All" so they are not included in the publish output.