feat: update DocsHeader component to disable search functionality by setting ShowSearch to false in HomeLayout, streamlining the layout for specific use cases

Author: Shewart

src/ShellDocs.Components/Layouts/HomeLayout.razor

@@ -1,7 +1,7 @@
 @inherits LayoutComponentBase
 
 <div class="home-shell">
-    <DocsHeader />
+    <DocsHeader ShowSearch="false" />
     <main class="home-main">
         @Body
     </main>