docs(config): add config documentation (#2592)
docs(config): add config documentation (#2592)

* docs(config): add config documentation

* fix broken table

* feedback

* more feedback

* add overview

mixed/lighthouse,wardpeet/lighthouse,wardpeet/lighthouse,GoogleChrome/lighthouse,arturmiz/lighthouse,tkadlec/lighthouse,arturmiz/lighthouse,mixed/lighthouse,GoogleChrome/lighthouse,ev1stensberg/lighthouse,deepanjanroy/lighthouse,deepanjanroy/lighthouse,GoogleChrome/lighthouse,ev1stensberg/lighthouse,wardpeet/lighthouse,tkadlec/lighthouse,umaar/lighthouse,GoogleChrome/lighthouse,arturmiz/lighthouse,mixed/lighthouse,umaar/lighthouse,tkadlec/lighthouse,umaar/lighthouse,GoogleChrome/lighthouse,wardpeet/lighthouse,arturmiz/lighthouse,mixed/lighthouse,ev1stensberg/lighthouse,ev1stensberg/lighthouse,wardpeet/lighthouse,deepanjanroy/lighthouse,umaar/lighthouse,deepanjanroy/lighthouse,deepanjanroy/lighthouse,arturmiz/lighthouse,tkadlec/lighthouse