Move run_example to own directory

[cjrace]

Overview of changes

After #118 failed, I'm now going for the bigger change of creating a separate directory for the run_example() app, so I have a directory I can point shinyapps.io to for the deployment. Have been following the notes in a shinytest2 vignette. Hoping this approach should work...

Relates to #110 but won't necessarily resolve it - I will need to check that after it goes into master.

run_example() still runs the example app.

PR Checklist

• I have updated the documentation (if needed)
• I have added or updated tests for these changes (if applicable)
• I have tested these changes locally using devtools::check()

Reviewer instructions

I copied the contents of run_example into an app.R file in it's own directory so nothing material should have change in the example app (aside from the note around where to find the code).

Main thing is to check that run_example() still opens an app for you, and that the package checks pass

[sarahmwong]

Thanks Cam! App runs fine with run_example() and devtools::check() passes all tests for me.

devtools::test() I get some errors though - cant find the skip_to_main() function, also skips the tests for testing the example app, can see it's meant to skip on CRAN but is this expected behaviour here? I have also just updated R on my mac so may be a me problem! I'll let you know if that turns out to be the case in this thread, but do you get the same errors?