Part of #4246
Changes:
* Update source code layout to follow the new conventions for this repo
* Update project files to use `<Reference>`
* Update targets to build NPM packages
* Update BuildTools to support custom 'restore' and 'test' targets
.NET Core 2.0 reached EOL last year. This removes multi-targeting our test projects and test assets to only use .NET Core 2.1 and .NET Framework 4.6.1.
This simplifies the way that we publish files to our network drop share.
Changes:
* Instead of explicitly listing every file that needs to publish, use directories to classify packages and artifacts into different categories.
* Add documentation for the expected layout of artifacts/
* Remove the need for static analysis to determine which packages go to which project
* Add the MSBuild property "IsProductPackage" to .csproj files which ship as a package to NuGet.org.
Replaces package references the following packages with local code:
Microsoft.AspNetCore.Certificates.Generation.Sources
Microsoft.Extensions.CopyOnWriteDictionary.Sources
Microsoft.Extensions.ClosedGenericMatcher.Sources
Microsoft.Extensions.ObjectMethodExecutor.Sources
Microsoft.Extensions.PropertyActivator.Sources
Microsoft.Extensions.PropertyHelper.Sources
Microsoft.Extensions.RazorViews.Sources
Microsoft.Extensions.SecurityHelper.Sources
Microsoft.Extensions.StackTrace.Sources
Microsoft.Extensions.WebEncoders.Sources
* Update Extensions to 3.0.0-preview.18569.14
* Update EFCore to 3.0.0-preview.18569.2
* Update corefx to preview.18566.8
* Update core-setup to preview-27117-01
Nate McMaster
Nate McMaster
David Fowler
Mazioudi Anas
Chris Ross
Nate McMaster
Pavel Krymets
Stephen Halter
Chris Ross (ASP.NET)