tree command, reimplementation of `doctrine:phpcr:node:dump` command

Added level option to `node:list` command, show node hierarchy, equivalent of `doctrine:phpcr:node:dump` command

````
PHPCRSH> node:list --level=3
PHPCRSH> node:list -L3
+------------------------+-----------------+---------------------------------------------------------+
| page/                  | nt:unstructured |                                                         |
| | main                 | nt:unstructured |                                                         |
| | | jcr:primaryType    | NAME            | nt:unstructured                                         |
| | | jcr:mixinTypes     | NAME            | [0] phpcr:managed                                       |
|                        |                 | [1] mix:referenceable                                   |
| | | phpcr:class        | STRING          | Symfony\Cmf\Bundle\RoutingAutoBundle\Document\AutoRoute |
| | | phpcr:classparents | STRING          | [0] Symfony\Component\Routing\Route                     |
|                        |                 | [1] Symfony\Cmf\...                                     |
| | | jcr:uuid           | STRING          | 1944d5b2-a036-4a06-b51b-6d6d6ecad5af                    |
| | | host               | STRING          |                                                         |
| | | defaults           | STRING          |                                                         |
| | | requirements       | STRING          |                                                         |
| | | options            | STRING          |                                                         |
| | | addFormatPattern   | BOOLEAN         | false                                                   |
| | | addTrailingSlash   | BOOLEAN         | false                                                   |
| | | routeContent       | WEAKREFERENCE   | 3ae8261a-c2f6-4289-8bd6-dd76891816d5                    |
| | | fooo               | STRING          | barrrr                                                  |
````