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>

config/afia.php

@@ -0,0 +1,10 @@
+<?php
+
+return [
+    // Afia — in-app AI assistant scoped to Ladill Mini.
+    'product' => env('AFIA_PRODUCT', 'mini'),
+    'enabled' => (bool) env('AFIA_ENABLED', true),
+    'provider' => env('AFIA_PROVIDER', 'openai'), // openai | anthropic
+    'model' => env('AFIA_MODEL', 'gpt-4o-mini'),
+    'api_key' => env('AFIA_API_KEY'),
+];