Added ControllerExtensions to be used instead of HtmlViewRenderer for net8

Added HttpException class for missing HttpException for net8

Wrapped HttpContext.Session, GetJsonResult, IsAjaxRequest and GetUserIdentityName in controllers for net8

Added AuthenticationService to test Fab2ApprovalMKLink code for net8

Compile conditionally flags to debug in dotnet core

Fab2ApprovalSystem/Views/CorrectiveAction/ReadOnlyCA.cshtml

@@ -44,7 +44,7 @@
             <div class="panel panel-default center-block" data-spy="affix">
                 <input type="button" value="Back to CA List" class="btn btn-primary btn-xs" id="CAList" />
                 <input type="button" value="Section Approval Log" class="btn btn-primary btn-xs" id="ShowSectionApprovalLog" />
-                @if (Session[GlobalVars.IS_ADMIN] != null)
+                @if (GlobalVars.IsAdminValueNotNull(Session))
                 {
                     <input type="button" value="Unlock Document" class="btn btn-primary btn-xs" id="UnlockDocumentBtn" onclick="UnlockDocument()" />
                 }