Move Cookie to own class (with tests)

Move Authentication to App namespace

src/Module/Delegation.php

@@ -3,7 +3,7 @@
 namespace Friendica\Module;
 
 use Friendica\BaseModule;
-use Friendica\Core\Authentication;
+use Friendica\App\Authentication;
 use Friendica\Core\Hook;
 use Friendica\Core\L10n;
 use Friendica\Core\Renderer;