Add authentication to Razor Pages project template

[DamianEdwards]

The authentication & identity features from the regular MVC project template need to be "pagified" and added to the Razor Pages project template.

Use the example here as a guide.

This will need to include changes for Authentication 2.0 and the Identity Services features when they land. It should also include the options for org auth, etc.

@mlorbetske @danroth27

[sayedihashimi]

We have the following auth types in the One ASP.NET dialog

• Individual Auth
• Work and School
• Windows Auth

Is this issue specific to Individual Auth? If so, what about Win and Work & School?

[danroth27]

We should have the same auth options for Razor Pages that we do for MVC.

[mlorbetske]

@phenning could you drive this please?

[mlorbetske]

@danroth27 we can close this now right? All the options that should be there (I think) are there.

[danroth27]

Yup, fixed by #980