Summary: Troubleshooting docs structure refactored. This should fix publishing of docs on GitHub which is currently failing, because of link to fb-only page from public page: https://github.com/facebook/flipper/actions/runs/2351680003.
Reviewed By: passy
Differential Revision: D36513180
fbshipit-source-id: c0339d437f560464e771e46dfc0a55782faf6a54
