JOSS Feedback Round 1

[rsh52]

Description

This PR addresses requests from the first round of reviewer feedback:

• Update the redcapAPI citation
• Update claims about REDCapTidieR and redcapAPI capabilities and specify differences
• Update acknowledgements to align with authorship

The original paper word count according to the JOSS bot was 1189 words (limit in the criteria is supposed to be 1000), and this adds even more. If there's any feedback on things to remove, happy to implement.

This PR closes #168 and closes #167

[rsh52]

For the time being placed the failing snapshot test in a skip_on_ci() so this doesn't block JOSS review. We can fix the test with a similar approach to the CGTTrialsReporter at a later point.

@spgarbet I believe you already "approved" on the review page, but tagging you for awareness as well.