Add ESM support

[zephraph]

This PR updates the tsup configuration to generate esm builds.

📦 Published PR as canary version: 1.3.0--canary.69.6b085bb.0

✨ Test out this PR locally via:

npm install @oxide/[email protected]
# or 
yarn add @oxide/[email protected]

[david-crespo]

wat

[zephraph]

I'm looking into it.

[zephraph]

Auto bug is fixed. There was an issue with a new version of git but that was fixed upstream.

[david-crespo]

Tried it in docs and there may be one more change required around CSS. Or it could be a change required on the docs side. Here's the import.

vite v5.1.4 building for production...
✓ 56 modules transformed.
x Build failed in 171ms
Error: [vite:css] [postcss] Missing "./styles/dist/main.css" specifier in "@oxide/design-system" package
file: /Users/david/oxide/docs/app/styles/index.css?transform-only:undefined:NaN
    at e (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:47384:25)
    at n (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:47384:627)
    at o (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:47384:1297)
    at resolveExportsOrImports (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:48061:20)
    at resolveDeepImport (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:48080:31)
    at tryNodeResolve (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:47805:20)
    at Context.resolveId (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:47568:28)
    at Object.resolveId (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:50762:64)
    at async Object.<anonymous> (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:67768:21)
    at async Object.resolve (file:///Users/david/oxide/docs/node_modules/vite/dist/node/chunks/dep-jDlpJiMN.js:31933:34) {
  code: 'PLUGIN_ERROR',
  loc: { file: undefined, line: undefined, column: NaN },
  pluginCode: "@import '@oxide/design-system/styles/dist/main.css';\n" +
    "@import '@oxide/design-system/styles/dist/yellow.css';\n" +
    "@import '@oxide/design-system/styles/dist/purple.css';\n" +
    "@import '@oxide/design-system/styles/dist/green.css';\n" +
    "@import '@oxide/design-system/styles/dist/blue.css';\n" +
    "@import '@oxide/design-system/components/dist/asciidoc.css';\n" +

// etc etc