Add project files.

Tmt.SaqaTravel/Components/Layout/MainLayout.razor

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+@inherits LayoutComponentBase
+
+<div class="flex flex-col sm:flex-row relative min-h-screen">
+    <div class="bg-gradient-to-b from-[#052767] to-[#3a0647] sm:w-[250px] sm:h-screen sm:sticky sm:top-0">
+        <NavMenu />
+    </div>
+
+    <main class="flex-1 flex flex-col">
+        <div class="bg-[#f7f7f7] border-b border-[#d6d5d5] flex items-center justify-between sm:justify-end h-14 sm:sticky sm:top-0 z-10 px-4 sm:px-8">
+            <a href="https://learn.microsoft.com/aspnet/core/" target="_blank" class="whitespace-nowrap sm:ml-6 no-underline hover:underline overflow-hidden text-ellipsis">About</a>
+        </div>
+
+        <article class="px-4 sm:px-8 py-4">
+            @Body
+        </article>
+    </main>
+</div>
+
+<div id="blazor-error-ui" class="hidden fixed bottom-0 left-0 w-full bg-[#ffffe0] p-3 shadow-[0_-1px_2px_rgba(0,0,0,0.2)] z-[1000]" data-nosnippet>
+    An unhandled error has occurred.
+    <a href="." class="underline text-blue-600">Reload</a>
+    <span class="dismiss cursor-pointer absolute right-3 top-2 text-gray-700">🗙</span>
+</div>