Allow embedding the wwwroot files

[budcribar]

Currently, neither of the Blazor controls support embedding the wwwroot files into the executable and publish as a single file. This is a major security issue especially if the application runs as an administrator, along with an installation inconvenience. In order to support this feature, the publishing step would first have to generate the wwwroot files before they could be embeded. Also, the Blazor controls would have to support reading the wwwroot files with the ManifestEmbeddedFileProvider which they currently do not.