Improve tracking of applied plugin data

[bheston]

Pull Request

Description

Added deduplication metadata to plugin node data values to better handle Figma cascading a value from a main component.

• Extracted plugin data access
• Removed tracking of the actual value of an applied token because it wasn't being used for anything and might frequently be stale
• Improved node reference resolution for more deeply nested component structures
• Addressed issue with cascading font styles too deeply

Test Plan

Tested in Figma plugin

Checklist

General

• I have included a change request file using $ npm run change
• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation for this project.