dotnet-new csproj templates (#4382)

Make csproj templates first-class in dotnet-new.

TestAssets/TestProjects/ProjectJsonWebTemplate/Views/Account/ForgotPassword.cshtml

@@ -0,0 +1,31 @@
+@model ForgotPasswordViewModel
+@{
+    ViewData["Title"] = "Forgot your password?";
+}
+
+<h2>@ViewData["Title"]</h2>
+<p>
+    For more information on how to enable reset password please see this <a href="https://go.microsoft.com/fwlink/?LinkID=532713">article</a>.
+</p>
+
+@*<form asp-controller="Account" asp-action="ForgotPassword" method="post" class="form-horizontal">
+    <h4>Enter your email.</h4>
+    <hr />
+    <div asp-validation-summary="All" class="text-danger"></div>
+    <div class="form-group">
+        <label asp-for="Email" class="col-md-2 control-label"></label>
+        <div class="col-md-10">
+            <input asp-for="Email" class="form-control" />
+            <span asp-validation-for="Email" class="text-danger"></span>
+        </div>
+    </div>
+    <div class="form-group">
+        <div class="col-md-offset-2 col-md-10">
+            <button type="submit" class="btn btn-default">Submit</button>
+        </div>
+    </div>
+</form>*@
+
+@section Scripts {
+    @{ await Html.RenderPartialAsync("_ValidationScriptsPartial"); }
+}