Create a codemod for easier theme-data migration

When we remove deprecated roles it would be good to have a codemod to help users migrate to the new roles.

Look into:
https://github.com/facebook/jscodeshift

Start by reviewing the jscodeshift project linked in the issue and determine how a codemod would support migration from deprecated theme roles to their replacements. Done means users have a codemod that assists this theme-data migration, but the issue does not identify the roles, source files, or tests to use.

Written by the indexing model from the issue text.