Airtable integration documentation

[gippy]

To finish the airtable integration work and to promote it we need to have documentation for it.

Ideally, the documentation should have the following:

1. Description of the integration - what it does, what do you need (airtable account)
2. Setup process - explain well the oAuth process and that users need to give access to a base in airtable
3. Outcome - how will the data look in airtable