Add payment_type and attends_cabinet_type to organisation schema
Add payment_type and attends_cabinet_type to organisation schema

This commit adds `payment_type` and `attends_cabinet_type` fields to the organisation schema. These fields contain strings if the relevant people are unpaid/paid as part of another role, and if they are non-Cabinet members who attend Cabinet.

alphagov/govuk-content-schemas,alphagov/govuk-content-schemas