feat: Add Icon to Error Message

[alimpens]

Describe the pull request

Thank you for contributing to the project!
Please use this template to help us handle your PR smoothly.

What

Adds an Icon to Error Message

Why

Error Message wasn't very prominent, and for colour-blind people or people using high contrast themes the Error Message wasn't very noticeable.

How

By adding a default icon and an icon prop.

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

The ticket specifies to add the Icon the same way we did for Radio. This isn't quite possible though, because we use the Icon component here, and it needs a Function instead of a ReactNode. We plan on changing this in the future though.