Updated namespaces + added auto-register

Author: Geolim4

composer.json

@@ -32,7 +32,10 @@
     "autoload": {
         "psr-4": {
             "Phpfastcache\\": "lib/Phpfastcache/"
-        }
+        },
+        "files": [
+            "lib/ExtensionRegister.php"
+        ]
     },
     "support": {
         "issues": "https://github.com/PHPSocialNetwork/phpfastcache/issues",

lib/ExtensionRegister.php

@@ -0,0 +1,7 @@
+<?php
+declare(strict_types=1);
+
+use Phpfastcache\ExtensionManager as PhpfastcacheExtensionManager;
+use Phpfastcache\Extensions\Drivers\Couchbasev4\Driver;
+
+PhpfastcacheExtensionManager::registerExtension('Couchbasev4', Driver::class);

lib/Phpfastcache/Drivers/Couchbasev4/Config.php renamed to lib/Phpfastcache/Extensions/Drivers/Couchbasev4/Config.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Phpfastcache\Drivers\Couchbasev4;
+namespace Phpfastcache\Extensions\Drivers\Couchbasev4;
 
 use Couchbase\ClusterOptions;
 use Couchbase\ThresholdLoggingOptions;

lib/Phpfastcache/Drivers/Couchbasev4/Driver.php renamed to lib/Phpfastcache/Extensions/Drivers/Couchbasev4/Driver.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Phpfastcache\Drivers\Couchbasev4;
+namespace Phpfastcache\Extensions\Drivers\Couchbasev4;
 
 use Couchbase\BaseException as CouchbaseException;
 use Couchbase\Bucket as CouchbaseBucket;

lib/Phpfastcache/Drivers/Couchbasev4/Item.php renamed to lib/Phpfastcache/Extensions/Drivers/Couchbasev4/Item.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Phpfastcache\Drivers\Couchbasev4;
+namespace Phpfastcache\Extensions\Drivers\Couchbasev4;
 
 use Phpfastcache\Core\Item\ExtendedCacheItemInterface;
 use Phpfastcache\Core\Item\TaggableCacheItemTrait;