[FrameworkBundle] Integrate console command

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

In fact this PR only ports the `app/console`-command into the `FrameworkBundle` and update `composer.json`, so it is handled by composer. The idea is to provide the command even if one creates an application, that isn't based directly on `symfony-standard` and additional this keeps the "binaries" together in one folder.