chore: Sort imports and exports in index files of Sass and React

[VincentSmedinga]

Describe the pull request

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What

This adds ./ before the path of all Sass @use rules where that’s missing.

Then I couldn’t help myself and sort the Sass imports, and then I did the React exports as well. We’ll need to resolve some conflicts in our current PRs, but not many and they are simple.

Why

Not sure if the relative imports are more robust now, but they are more consistent. And sorting things is fun.

How

N/A

Checklist

Before submitting your pull request, please ensure you have done the following. Check each checkmark if you have done so or if it wasn't necessary:

• Add or update unit tests
• Add or update documentation
• Add or update stories
• Add or update exports in index.* files
• Start the PR title with a Conventional Commit prefix, as explained here.

Additional notes

• None

[alimpens]

Fun fact :D I prefer the imports the way they were, seeing as Sass documents this behaviour explicitly.