feat: Add new WebClientBase Blazor application and MktZaloService API, and update WhatsAppService and MktXService infrastructure.

apps/web-client-base-net/src/WebClientBase.Client/Layout/MainLayout.razor

@@ -0,0 +1,16 @@
+@inherits LayoutComponentBase
+<div class="page">
+    <div class="sidebar">
+        <NavMenu />
+    </div>
+
+    <main>
+        <div class="top-row px-4">
+            <a href="https://learn.microsoft.com/aspnet/core/" target="_blank">About</a>
+        </div>
+
+        <article class="content px-4">
+            @Body
+        </article>
+    </main>
+</div>