Add Ladill POS v1 — register, Pay checkout, and commerce links.

Staff-facing counter register at pos.ladill.com with catalog cart, cash and
MoMo/card checkout via Ladill Pay, CRM timeline/import, invoice prefill, and
Merchant catalog import.

Co-authored-by: Cursor <cursoragent@cursor.com>

resources/views/components/input-error.blade.php

@@ -0,0 +1,9 @@
+@props(['messages'])
+
+@if ($messages)
+    <ul {{ $attributes->merge(['class' => 'text-sm text-red-600 space-y-1']) }}>
+        @foreach ((array) $messages as $message)
+            <li>{{ $message }}</li>
+        @endforeach
+    </ul>
+@endif