This should now correctly require VS 15.7-preview1 or newer with the
ASP.NET and web development tools to installed.
Removed the Razor Language Servcies dependency since it's prompting an
install of the wrong tools from the VS gallery.
Have to do some gritty work to be able to show a proper version in the
about dialog. The generation of the proper assembly attributes is part
of the new-style csproj, so we don't get to use it for free.
The Directory.Build.{props targets} files are designed for a new-style
csproj. Old-style csproj, which the VSIX uses don't support
PackageReference where the version is a variable.
Implements Component code generation and tooling support end to end
udditionally adds some default `@addTagHelper` directives to make
programming in Blazor a little nicer.
Components are discovered as Tag Helpers using Razor's extensibility
during the build/IDE process. This drives the code generation during
build and lights up a bunch of editor features.
Add