fix(494): fixed checkboxGroup validation and reorganized simple form

[bjmccotter7192]

Description

Fixed the validation error on the SimpleApp example page by adding the parent name to each option so formik knows what to validate against.

Original issue(s)

department-of-veterans-affairs/va-forms-system-core#494

Testing done

• [x] UI testing seems to be working
• [x] Unit Tests still all pass

Definition of done

• [ ] Package.json version has been updated to match Github release tag
• [ ] Documentation has been updated, if applicable
• [ ] A link to the original github issue has been provided
• [ ] No sensitive information (i.e. PII/credentials/internal URLs etc.) is captured in logging, hardcoded, or specs

[va-vsp-bot]

:tada: This PR is included in version 1.2.4 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: