Support configurability of patient's available appointment slot options

[saewitz]

Currently when booking appointments, Ottehr supports an urgent care use case where patients are given options for only today/tomorrow. Modify telemedicine to allow configuration of how available appointment slots are given. This does not necessarily need to be presented as an option in any UI for an admin to configured, but could instead be part of the build or deploy process. As a first pass, allowing configuration of N days booking and a UI appropriate to the number of days allowed is probably good enough.

Related #171

• [ ] The schedule loads on prebook pages, for example /location/slug/in-person/prebook
• [ ] The code can be changed in get-schedules to change the number of days slots are ready NUM_DAYS
• [ ] The first two tabs on the should be the next two available days
• [ ] If a slot is not selected the user should get a message to select a slot

[dmabram]

This ticket might just be part of creating a simple generic intake: https://github.com/masslight/ottehr/issues/178