Summary:
Currently, the `app inspect` tooltip at the left rail has a link to the getting started page that doesn't exist.
New path is `/docs/getting-started/`.
Also fix troubleshooting guide and no devices are found to `/docs/getting-started/troubleshooting/`
Pull Request resolved: https://github.com/facebook/flipper/pull/4042
Reviewed By: lawrencelomax
Differential Revision: D39314971
Pulled By: lblasa
fbshipit-source-id: 000b354b60bd05211b99134b63d790bf6949060f
2b927b4e72