[Feature]: Adding documentation for checking if students put in the correct arguments for functions

[mitchelloharawild]

Feature Description

          Adding documentation for checking if students put in the correct arguments for functions. 

• This is to check to see if any of the arguments in the function contains "cars" c("responese you want to put in" != "cars" %in% all.vars(.code))

• To check for the location for the arguments i.e. the function contains multiple arguments, you might want to use [] to locate the functions. str(<<cars>>) ??? p <- .code[[1]][[2]][[2]]

Originally posted by @DanyangDai in https://github.com/learnr-academy/quarto-forms-teachr/issues/1#issuecomment-2136486448

[mitchelloharawild]

More helper functions for code checking / metaprogramming would make this easier.