Added chmod perm, modal to change, api with local/ftp/sftp (#399)

Read a fill current permissions for local driver

Finished permissions for ftp driver, read and change

Read permissions for sftp adapter

Created FilegatorFtp for a cleaner permissions integration

Implemented recursive chmod options for files/folders

Modified tests to cover permissions

Lint frontend permissions component

docs/configuration/storage.md

@@ -43,7 +43,7 @@ Sample configuration:
                 'separator' => '/',
                 'config' => [],
                 'adapter' => function () {
-                  return new \League\Flysystem\Adapter\Ftp([
+                  return new \Filegator\Services\Storage\Adapters\FilegatorFtp([
                       'host' => 'example.com',
                       'username' => 'demo',
                       'password' => 'password',