Investigate UI for updating design tokens

[viktorrusakov]

Having design tokens stored in JSON files it would be great to be able to customize them through some UI on the documentation site, instead of opening a PR to change a single value. This would greatly improve quality of life for designers

AC

• Investigate and document what it would take to build a self-serve UI to customize the core design tokens (ideally you should be able to authenticate on the documentation website, go to a specific page, edit value, click 'save' button and it would trigger a new build of Paragon, even more ideal to get a preview before build 🙂 )
• Important: consider Paragon’s theming support - consumers might want to change token values in their own branding NPM package - should we support it? is there even a way to support it?