Add dfeshiny package

[rmbielby]

Pull request overview

The dfeshiny package only has functions to run tidy_code() and support_panel() so far, but I've wired these up to keep momentum. This version of the template allows the user to run the dfeshiny version of tidy code (with the local code having been removed) and renders the support panel using the dfeshiny function.

Aiming to add the updated commit hooks in as well from the KS4 dashboard, which would complement this as that uses tidy_code().

Pull request checklist

Please check if your PR fulfils the following:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Tests have been run locally and are passing (run_tests_locally())
• Code is styled according to tidyverse styling (checked locally with tidy_code())

[cjrace]

One last small thing before I approve - we seem to get a random line of guidance appear when running the tests?

[rmbielby]

One last small thing before I approve - we seem to get a random line of guidance appear when running the tests?

Fixed now