"The case for booking" theory of change doc

[nickevansuk]

Build on what's included in https://www.openactive.io/what-is-open-booking/

“The case for booking” theory of change doc. Write down the rationale, so that it's centralised in one place. Broadest number of use cases, include interest from broad selection of startups. User journey, end-to-end tracking. Additionally major drivers of the initiative are interested in booking. Screenshot Open Banking to show the parallel. Explain how Open Booking increases data quality for all.

[nishaldesai]

@nickevansuk https://docs.google.com/document/d/1CDWuC6JXO3AbB41JaddKiLXA2tzhfdW9Mo0oujZ2alQ/edit

Collating content from various docs, consolidating, cleaning up, adding more recent context.