fix(vite): Change config for mantine and chakra to use export default

[dac09]

This fixes the templates for Chakra UI and Mantine, to avoid using module.exports which is not supported in Vite (because its commonjs)

Note: not changing tailwind because tailwind is used differently. I think it was incorrect for us to place mantine and chakra config in the config folder - because it's actually imported in the app (it's a source file, not config), where as tailwind is not.

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For release notes (existing users):
If you're using Chakra or Mantine, you will need to update how these libraries are configured. You might see this error in your browser console:

Uncaught ReferenceError: module is not defined

To fix this you'll need to make sure you're not using module.exports in your web/config/mantine.config.js or web/config/chakra.config.js.

Codemod available:

npx @redwoodjs/codemods@canary update-theme-config

Manual steps:
The change is simple:

// This is common JS lets get rid of it!
- module.exports = {/**....your theme **/}
+ const theme = {/**....your theme **/}
+ export default theme

[dac09]

@thedavidprice want to try this out in your branch? Simple change :)

[thedavidprice]

Test QA for both chakra and mantine is ✅

Note: I did not do QA on codemod — leaving that to you.

Thanks! 🚀