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/Areas/Identity/Pages/Account/Manage/_Layout.cshtml

@@ -0,0 +1,29 @@
+@{
+    if (ViewData.TryGetValue("ParentLayout", out var parentLayout) && parentLayout !=  null)
+    {
+        Layout = parentLayout.ToString();
+    }
+    else
+    {
+        Layout = "/Areas/Identity/Pages/_Layout.cshtml";
+    }
+}
+
+<h1>Manage your account</h1>
+
+<div>
+    <h2>Change your account settings</h2>
+    <hr />
+    <div class="row">
+        <div class="col-md-3">
+            <partial name="_ManageNav" />
+        </div>
+        <div class="col-md-9">
+            @RenderBody()
+        </div>
+    </div>
+</div>
+
+@section Scripts {
+    @RenderSection("Scripts", required: false)
+}