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>

app/Services/Crm/CrmClient.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Services\Crm;
+
+use Illuminate\Http\Client\ConnectionException;
+use Illuminate\Http\Client\PendingRequest;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Validation\ValidationException;
+
+class CrmClient
+{
+    public function __construct(private readonly string $owner) {}
+
+    public static function for(string $owner): self
+    {
+        return new self($owner);
+    }
+
+    public function customers(array $filters = []): array
+    {
+        return $this->get('customers', $filters);
+    }
+
+    public function products(array $filters = []): array
+    {
+        return $this->get('products', $filters);
+    }
+
+    public function pushTimeline(array $data): array
+    {
+        return $this->post('timeline', $data);
+    }
+
+    private function client(): PendingRequest
+    {
+        return Http::baseUrl((string) config('crm.url'))
+            ->withToken((string) config('crm.key'))
+            ->acceptJson()
+            ->asJson()
+            ->connectTimeout(10)
+            ->timeout(20);
+    }
+
+    private function get(string $path, array $query = []): array
+    {
+        return $this->handle(fn () => $this->client()->get($path, [...$query, 'owner' => $this->owner]));
+    }
+
+    private function post(string $path, array $data): array
+    {
+        return $this->handle(fn () => $this->client()->post($path, [...$data, 'owner' => $this->owner]));
+    }
+
+    private function handle(callable $request): array
+    {
+        try {
+            $response = $request();
+        } catch (ConnectionException) {
+            throw ValidationException::withMessages([
+                'crm' => ['Could not reach the CRM service. Please try again in a moment.'],
+            ]);
+        }
+
+        if ($response->failed()) {
+            abort($response->status() === 404 ? 404 : 502, 'CRM service error.');
+        }
+
+        return (array) $response->json();
+    }
+}