Create Tailwind style tokens

Vue-Doxen has pre-made style token maps for Bootstrap and Vuetify. Tailwind is very popular, so it would be nice to have a Tailwind preset that people could use as a starting point. 1. Follow the [steps to run the repo locally](https://github.com/TheJaredWilcurt/vue-doxen/blob/main/README.md#running-this-repo-locally-to-make-prs). 1. Read this page before starting: * https://thejaredwilcurt.com/vue-doxen/styles 1. Add a `styleTokensTailwind` object to `lib/helpers/styleTokens.js`. 1. Update `/app/components/StyleSwapper.vue` to include a Tailwind CSS file and the `styleTokensTailwind` object. 1. Add classes to the `styleTokensTailwind` object until every page on the Docs site looks good.