Add product links comment to PHP client

Author: MudassarTariq

lib/IpGeolocationClient.php

@@ -4,6 +4,13 @@
 
 namespace Ipgeolocation\Sdk;
 
+/**
+ * Main client for the IPGeolocation.io IP Location API.
+ *
+ * Homepage: https://ipgeolocation.io
+ * IP Location API: https://ipgeolocation.io/ip-location-api.html
+ * Documentation: https://ipgeolocation.io/documentation/ip-location-api.html
+ */
 final class IpGeolocationClient
 {
     private readonly IpGeolocationClientConfig $config;