Lint all of the DETECT F/U Interview code with styler

[mbcann01]

Overview

• Not all of the code in the detect_fu_interviews_public repository is styled consistently according to the tidyverse style guide.
• I found a package that will allow us to easily and automatically style the code. In my tests, it seems to do a good job. The package is called styler.
• @edambo please use this package to style each of the code files in the detect_fu_interviews_public repository, when you get a chance.