Add check for R 4.1 for NIDAP

[kelly-sovacool]

In GitHub Actions R-CMD-Check, explicitly check the version of R required by NIDAP. Make sure we don't require users to have > 4.1, as it's not clear when NIDAP will upgrade R.

[kelly-sovacool]

we may need to add checks within the R code for the user's R version and only allow/support certain functions depending on the R version -- e.g. for new tools that require R >= 4.3.

[kelly-sovacool]

this may not be needed if NIDAP will upgrade to R 4.3 before we deploy this package

[kelly-sovacool]

not needed