adding hidden basic asp.net core backend (#30)

Base functionality:

    DB
    email sending
    user registration & login
    storing new characters and reading them back

Notes:

    Functionality is "hidden" with no links pointing to it.
    Most pages are scaffolded and not reviewed at all :(
    local Dev db setup is pushed to git
    NO local email setup :(

Kemkas.Web/Pages/Shared/_LoginPartial.cshtml

@@ -1,5 +1,5 @@
 @using Microsoft.AspNetCore.Identity
-@using Kemkas.Web.Models;
+@using Kemkas.Web.Db.Models;
 @inject SignInManager<ApplicationUser> SignInManager
 @inject UserManager<ApplicationUser> UserManager