Improve how docs work with thegraph.market relative to getting JWT for the token api

[matthewdarwin]

The UX using the Token API from within the docs is not the greatest because of the authentication requirements.

We have a better way to do that now. Example is on https://token-api.pinax.network/

• Click Login (top right)
• That directs you to https://thegraph.market/auth/tokenapi-env in a new window
• You can then copy/paste your JWT back to the application and save it as a cookie.

Hopefully this is not a huge effort to replicate this kind of flow in the docs.