[WIP] Started integration RoutingAuto

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   |
| Fixed tickets | https://github.com/symfony-cmf/cmf-sandbox/issues/265
| License       | MIT
| Doc PR        | 
I guess we should also add it to symfony-cmf/symfony-cmf .. question is if it should be in the suggest or the require ..

/cc @dbu @dantleech @WouterJ