fix(tailwind starter): switch from cjs to esm to support vite 5

[thejackshelton]

When adding the tailwind integration with 1.3.1, we get the following error:

node:internal/process/promises:289
            triggerUncaughtException(err, true /* fromPromise */);
            ^

[Failed to load PostCSS config: Failed to load PostCSS config (searchPath: /Volumes/Primary/Code/eatess/cruncho-landing): [ReferenceError] module is not defined in ES module scope
This file is being treated as an ES module because it has a '.js' file extension and '/Volumes/Primary/Code/eatess/cruncho-landing/package.json' contains "type": "module". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.
ReferenceError: module is not defined in ES module scope
This file is being treated as an ES module because it has a '.js' file extension and '/Volumes/Primary/Code/eatess/cruncho-landing/package.json' contains "type": "module". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.

This is vite 5 telling us we are using CJS, and we should either have it as an es module, or rename the file to .cjs so that CJS continues to work.

https://vitejs.dev/guide/migration.html#deprecate-cjs-node-api

It seems that ESM works fine here, so I've made a tiny PR so that this behavior is fixed.

Related:
https://discord.com/channels/842438759945601056/1188215300236251279/1188268842682699846
https://discord.com/channels/842438759945601056/1187876025913327756/1187876025913327756

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[gioboa]

Thanks @thejackshelton you rock