Enable eslint rule and reject with errors instead of strings

[kox]

Following #13 , this PR intends to enable the eslint rule: prefer-promise-reject-errors as error.

I believe that treating promise rejections as errors ensures better handling and propagation of the rejection reason to the final components. The affected package tests have been updated accordingly.

[changeset-bot]

⚠️ No Changeset found

Latest commit: a6715b3

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR