Add BlackFriday offer

Author: yordanov

RadzenBlazorDemos/Pages/Index.razor

@@ -11,6 +11,11 @@
 </HeadContent>
 
 <div class="demos-home light rz-px-6 rz-px-md-12">
+  <RadzenStack class="rz-mx-0 rz-mx-sm-6 rz-mx-lg-12 rz-mx-xl-auto rz-mt-6 rz-background-color-base-darker rz-p-6 rz-mb-0 rz-mb-md-12" Style="max-width: 1300px; border-radius: var(--rz-card-border-radius);" Gap="0" AlignItems="Radzen.AlignItems.Center">
+    <RadzenText class="rz-color-on-base-darker rz-m-0" TextAlign="Radzen.TextAlign.Center">
+      Our Black Friday offer is live! Apply code <strong>BLACKFRIDAY2025</strong> at checkout and <strong>save $100</strong>. <RadzenLink Text="See Pricing" Path="https://www.radzen.com/pricing" class="rz-color-primary-light" target="_blank"></RadzenLink>
+    </RadzenText>
+  </RadzenStack>
   <RadzenStack Orientation="Orientation.Vertical" Gap="0px" class="rz-mx-auto">
     <RadzenRow>
       <RadzenColumn Size="12" class="rz-text-align-center">

RadzenBlazorDemos/Shared/MainLayout.razor

@@ -45,6 +45,11 @@
                 <RadzenColumn Size="12">
                     <RadzenRow class="rz-mx-auto" Style="max-width: 1600px;">
                         <RadzenColumn Size="12" SizeMD=@(example?.Toc != null ? 10 : 12)>
+                            <RadzenStack class="rz-mx-0 rz-mx-sm-6 rz-mx-lg-12 rz-mx-xl-auto rz-mt-6 rz-background-color-base-darker rz-p-6 rz-mb-0 rz-mb-md-8" Style="max-width: 1760px; border-radius: var(--rz-card-border-radius)" Gap="0" AlignItems="Radzen.AlignItems.Center">
+                                <RadzenText class="rz-color-on-base-darker rz-m-0" TextAlign="Radzen.TextAlign.Center">
+                                    Our Black Friday offer is live! Apply code <strong>BLACKFRIDAY2025</strong> at checkout and <strong>save $100</strong>. <RadzenLink Text="See Pricing" Path="https://www.radzen.com/pricing" class="rz-color-primary-light" target="_blank"></RadzenLink>
+                                </RadzenText>
+                            </RadzenStack>
                             @Body
                             <RadzenCard class="rz-mt-12 rz-display-block rz-p-6 rz-p-md-12 rz-pb-12 rz-background-color-base-darker dark" Style="overflow: hidden; ">
                                 <RadzenRow AlignItems="AlignItems.Center" Gap="0px" class="rz-pb-12 rz-mb-4">