Document how to make a feature request

[hturner]

Is your feature request related to a problem? Please describe.
This is a FAQ on the Slack and elsewhere (e.g. https://fosstodon.org/@[email protected]/110112514509758439).

Describe the solution you'd like
This may need to be a new chapter so people can find it, but it wouldn't be very long.

The standard advice is to float the idea on R-devel to get feedback from R Core. We might also offer the Slack as a place to get an initial reaction from peers (Do others think it's a good idea? Does it already exist? Should it be in a package?).

We can also discuss the wishlist on Bugzilla (bug reports may get labelled as wish list items if they are actually something the reporter wishes a function would do but it's not designed to do that; people may post wishlist items rather than bug reports but these tend to get ignored if not discussed first on R-devel).

Case studies of successful and unsuccessful (but kindly handled) feature requests might be good.

Describe alternatives you've considered
N/A

Additional context
N/A