* Initial work on adding new mapping variable type

* Remove add button

* Update custom variable type to include key/value mapping

* Update custom variable docs

* Try to fix failing build

* Update reducer.ts

* Fix failing build

* Remove expansion of the colon

* Update docs

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>