feat: add versioning to the Designer plugin

[bheston]

Feature Request

The plugin allows for applying design definitions, in the form of design tokens and style modules, to layers in Figma. This is based on a string key of a hierarchical arbitrary structure, like "color -> neutral -> fill discernible" which would look like "color-neutral-fill-discernible".

Expected Behavior

To be able to map a renamed token to its previous name. This should work based on the previous version only, so if the name changed twice that would require a total of three versions of definitions to work properly (original, rename 1, rename 2). When updating a document that uses the "original" version to latest, the full path would need to be evaluated.

Current Behavior

There is no support for versioning or renaming, so when attempting to work with an old design with the latest definition loaded in the plugin, renamed tokens or style modules would not be found and therefore would not be evaluated.