Provide autocompletion for DIC parameters defined dynamically

[stof]

Currently, parameters defined dynamically in DI extensions (or in the kernel) are not recognized by the autocompletion when there is no compiled container (which is always the case when working on a bundle rather than a fullstack project). It would be great to look at calls to ContainerBuilder::setParameter() to detect additional parameters

[Haehnchen]

we should also index tags, service defs, and other stuff. see #216. because of not having fully type analysis in index process there is a need for whitelisted typehints like \Symfony\Component\DependencyInjection\ContainerBuilder.

[Haehnchen]

done