PAW: Implement checkbox and radio button validation

[wesrowe]

Description

User story

AS A Veteran I WANT to be alerted clearly when I have not provided a required response to a question SO THAT I can continue with minimal cognitive difficulty.

Engineering notes / background

• Note that checkbox validation was simplified to simply requiring a response
• Designs in Figma – see Form Validation tab

Analytics considerations

Quality / testing notes

Acceptance criteria

Consider

• Design / Accessibility reviews
• Collab cycle requirements
• Device sizes (mobile first)
• Documentation updates / Change management < - Content model documentation
• Testing notes

• [x] Validation occurs on all questions
• [x] Tests implemented per plan
• [x] Design review
• [ ] PM review

[randimays]

PR up for review: https://github.com/department-of-veterans-affairs/vets-website/pull/25685

It piggybacks on the Burn Pit questions PR, so that one needs to get merged in first.

[thejordanwood]

@randimays This has design approval!

edit: This has design approval for radio buttons.

[randimays]

Holding the ticket until Agent Orange questions are ready so we can also validate the error messaging for checkboxes.

[randimays]

End of sprint update: this ticket is paired with the release of Agent Orange. We still need to validate the checkbox error message. It will carry over, but only for a day or so I imagine.

[randimays]

Jordan approved the validation for checkbox error messages. Slack thread. Closing!

[randimays]

Re-opening. I closed this too early; the code hasn't been merged yet. Will close again when it's validated in staging.

[randimays]

Validated in staging. Closing!