Add warning message when scaling steps return NaN

[mastoffel]

Adds warning when step_scale() returns NaN columns due to Inf or na_rm=False

Closes #1221

[EmilHvitfeldt]

Hello @mastoffel 👋 thanks for taking on this work!!

Good work so far!

There are a few other places where we need warnings such as in step_range()

library(recipes)

recipe(~., data = data.frame(x = rep(1, 10))) |>
  step_range(x) |>
  prep() |>
  bake(NULL)
#> # A tibble: 10 × 1
#>        x
#>    <dbl>
#>  1   NaN
#>  2   NaN
#>  3   NaN
#>  4   NaN
#>  5   NaN
#>  6   NaN
#>  7   NaN
#>  8   NaN
#>  9   NaN
#> 10   NaN

or in step_center() if Inf is passed in

library(recipes)

recipe(~., data = data.frame(x = rep(0, 10))) |>
  step_log(x) |>
  step_center(x) |>
  prep() |>
  bake(NULL)
#> # A tibble: 10 × 1
#>        x
#>    <dbl>
#>  1   NaN
#>  2   NaN
#>  3   NaN
#>  4   NaN
#>  5   NaN
#>  6   NaN
#>  7   NaN
#>  8   NaN
#>  9   NaN
#> 10   NaN

If you are not up for those other checks we can change it so it references the issues instead of closing it.

also, please add a bullet in the NEWS file as well. giving yourself credit

[mastoffel]

Thanks a lot for the detailed comments @EmilHvitfeldt ! I've added warnings to step_center() and step_range() too now. Let me know if anything is off!

[EmilHvitfeldt]

Thanks for all the help @mastoffel !! if there are any other issues you want to work on, message in them and we will see what we can do!

[github-actions]

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