Detect appropriate config file to inject config provider into

[kynx]

Feature Request

Q	A
New Feature	yes
RFC	yes
BC Break	no

Summary

It would be nice if the component installer could work out if a dependency should (probably) be injected into the development or production config file and use this as the default choice presented to the user.

I'm not 100% sure how this could be done. Perhaps check the keywords for the package being installed (see https://getcomposer.org/doc/04-schema.md#keywords)?