[WIP] Create custom behavior for RouteNotFoundException

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | no
| Fixed tickets | #10
| License       | MIT
| Doc PR        | need to be done

Todo:
* [ ] implement the `create()` methods of the base matcher i created (parent, ancestor)
* [ ] bring the `BestMatcherPresentation` to use the custom exception.html.twig i created
* [ ] test for `BestMatcherPresentation`
* [ ] tests for both base matcher
* [ ] finish frontend test by crawling for some given stuff
you don't want to use a query but instead want to use ``getChildren()`` .. there is a method for this both on the PHPCR as well as the PHPCR ODM level. In both cases you first need to fetch the parent (node or document).