[FEATURE] Include `select_choices_and_calculations` in metadata tibbles

[ezraporter]

Feature Request Description

The elements of supertibble$redcap_metadata currently drop the select_choices_and_calculations column. We should include all fields returned in the metadata by the REDCap API.

Proposed Solution

Don't drop select_choices_and_calculations in add_metadata(). Note that this means that the content of select_choices_and_calculations would be duplicated across rows for checkbox fields like this:

field_name	field_type	select_choices_or_calculations
my_field__1	checkbox	1, 1 | 2, 2 | -99, Unknown
my_field__2	checkbox	1, 1 | 2, 2 | -99, Unknown
my_field__-99	checkbox	1, 1 | 2, 2 | -99, Unknown

Additional Context

This is where the change needs to be made + our (my?) original thinking: https://github.com/CHOP-CGTInformatics/REDCapTidieR/blob/51ced1e68d20652da0f8854cafeecef88ad2db73/R/read_redcap.R#L325-L328

Checklist

• [x] The issue is atomic
• [x] The issue description is documented
• [x] The issue title describes the problem succinctly
• [ ] Developers are assigned to the issue
• [x] Labels are assigned to the issue