Upgrade Node to 20 and swap from webpack/vue-cli to Vite.

[ashsny]

This involved:

• explicitly adding the implicit dependency on the uuid package,
• resolving the conflict @urbn/vuex-helpers and vuex by removing the former, the conflict not having shown itself until the Node version upgrade,
• moving index.html and making the necessary changes to it,
• adding a basic vite.config.js,
• removing babel and support for old browsers (probably not strictly necessary),
• removing core-js and using native js Array.reverse instead,
• upgrade eslint and eslint-plugin-vue versions (unclear if necessary),
• adding @vitejs/plugin-basic-ssl to generate a self-signed SSL cert,
• adding Node polyfills to support use of Buffer via csv-parse (though see Mostly extraneous Node polyfills #82),
• swap base64url for universal-base64url in service of eventually removing the above,
• remove vestigial d3_rebind code that did not co-operate with Vite/Rollup,
• changing imports in FlexDataTable.vue following https://github.com/bbi-lab/bbi-lims-ui/commit/205a5dc356fd475c9b52071e2e4a9ad77ace9e21 to support Rollup, and
• package.json scripts and README.md updates for new dev workflows.

[jstone-dev]

All these changes look exactly right. Soon (if you want) we should be able to import components like FlexDataTable from a separate npm package, which is present here in an old version; sorry you had to do some extra work to get it working with Node 20 and Vite, but the changes look good.