add notifications logic and add support of both JWT and Sanctum

app/Services/Notifications/NotificationReadService.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Services\Notifications;
+
+use App\Models\UserNotification;
+
+class NotificationReadService
+{
+    public function markRead(int $userId, int $notificationId): bool
+    {
+        $row = UserNotification::query()
+            ->where('user_id', $userId)
+            ->where('notification_id', $notificationId)
+            ->first();
+
+        if (!$row) {
+            return false;
+        }
+
+        $row->is_read = true;
+        $row->save();
+
+        return true;
+    }
+}