Moved some elements in Common module to more proper locations

module/IpGeolocation/README.md

@@ -0,0 +1,18 @@
+#  IP Address Geolocation module
+
+Shlink module with tools to locate an IP address suing different strategies.
+
+```php
+<?php
+declare(strict_types=1);
+
+return [
+
+    'geolite2' => [
+        'db_location' => __DIR__ . '/../../data/GeoLite2-City.mmdb',
+        'temp_dir' => sys_get_temp_dir(),
+        // 'download_from' => 'http://geolite.maxmind.com/download/geoip/database/GeoLite2-City.tar.gz',
+    ],
+
+];
+```

module/IpGeolocation/config/geolite2.config.php

@@ -0,0 +1,35 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\IpGeolocation;
+
+use GeoIp2\Database\Reader;
+use Zend\ServiceManager\AbstractFactory\ConfigAbstractFactory;
+use Zend\ServiceManager\Proxy\LazyServiceFactory;
+
+return [
+
+    'dependencies' => [
+        'factories' => [
+            Reader::class => ConfigAbstractFactory::class,
+        ],
+        'delegators' => [
+            // The GeoLite2 db reader has to be lazy so that it does not try to load the DB file at app bootstrapping.
+            // By doing so, it would fail the first time shlink tries to download it.
+            Reader::class => [
+                LazyServiceFactory::class,
+            ],
+        ],
+
+        'lazy_services' => [
+            'class_map' => [
+                Reader::class => Reader::class,
+            ],
+        ],
+    ],
+
+    ConfigAbstractFactory::class => [
+        Reader::class => ['config.geolite2.db_location'],
+    ],
+
+];