docs(developer-tool-faq): create (Yelp#440)

* docs(developer-tool-faq): create

* refactor(developer-tool-faq): plugins folder

* docs(developer-tool-faq): cause 4 relative link

* docs(developer-tool-faq): fix grammar

* docs(developer-tool-faq): run doctoc

* docs(developer-tool-faq): more grammar fixes

* docs(developer-tool-faq): run doctoc

* docs(developer-tool-faq): more grammar fixes

* docs: one more thing...