Add transformation information to --info

[WardBrian]

Closes #1461.

Bikeshedding: Should this new field be called constraint, transform, or something else?

Submission Checklist

• [x] Run unit tests
• Documentation
  • [ ] If a user-facing facing change was made, the documentation PR is here: <LINK>
  • [ ] OR, no user-facing changes were made

Release notes

The --info flag will now also give information about the transformations of each variable

Copyright and Licensing

By submitting this pull request, the copyright holder is agreeing to license the submitted work under the BSD 3-clause license (https://opensource.org/licenses/BSD-3-Clause)