* Make endpoint middleware explicit
This change makes the endpoint middleware explicit again, and updates
all of the templates.
The other change here is make UseEndpoints be the place where you
register endpoints. This is vital because it puts your code visually at
the point of the pipeline where it executes.
Lastly, I removed support for UseMvc with endpoint routing. This is
causing issues for some security features, and we're moving in the
direction of trying to make the middleware heavy implementation required
in 3.0. There are some issues we won't be able to fix in MVC if we can't
unambiguously know if UseMvc was used or the middleware.
[Templating] Adds authentication support for the SPA templates
* Adds a new -auth option to the Angular and React templates with None and Individual values.
* When using authentication it configures the server to use the ApiAuthorization support built for 3.0
* For angular it adds an ApiAuthorization Angular module that handles the authentication flows through
a Login and a Logout components and exposes an Http client interceptor, a routing guard and a Login
menu component for the main Angular application to integrate authentication into the app.
* For react it adds a Login and Logout components to handle the authentication flows, an
AuthorizeRoute component to protect access to other routes and a Login menu component to
integrate authentication into the application.