Feature/1929 checkbox hidden label

[ab2583]

Summary of the changes

I've added a hideLabel prop to ic-checkbox like the one that existgs on other components auch as ic-checkbox-group. When the label is hidden it is added as an aria-label on the checkbox.

Related issue

1929

Checklist

General

• [x] Changes to docs package checked and committed.
• [x] All acceptance criteria reviewed and met.

Testing

• [x] Relevant unit tests and visual regression tests added.
• [x] Visual testing against Figma component specification completed.

Accessibility

• [x] Accessibility Insights FastPass performed.
• [x] A11y unit test added and yields no issues.
• [x] A11y plug-in on Storybook yields no issues.
• [x] Manual screen reader testing performed using NVDA and VoiceOver.
• [x] Manual keyboard testing for keyboard controls and logical focus order.
• [x] Correct roles used and ARIA attributes used correctly where required.
• [x] Logical heading structure is maintained, and the HTML elements used for headings can be changed to fit within the wider page structure.

Resize/zoom behaviour

• [x] Page can be zoomed to 400% with no loss of content.
• [x] Screen magnifier used with no issues.
• [x] Text resized to 200% with no loss of content.
• [x] Text spacing increased as per the WCAG 1.4.12 success criterion with no loss of content.

System modes

• [x] Browser setting 'prefers reduced motion' tested. No animations or motion visible whilst this setting is on.
• [x] Windows High Contrast mode tested with no loss of content.
• [x] System light and dark mode tested with no loss of content.
• [x] Browser support tested (Chrome, Safari, Firefox and Edge).

Testing content extremes

• [x] Min/max content examples tested with no loss of content or overflow.
• [x] All prop combinations work without issue.
• [x] Tested for FOUC (Flash of Unstyled Content) in both SSR (Server-Side Rendering) and SSG (Static Site Generation) settings.
• [x] Controlled and uncontrolled input components tested.

[GCHQ-Developer-530]

Happy with this from a dev perspective, will just need someone from the core team to run the cypress visual regression action once this PR has been merged so we can have the CI generated image of the checkbox without a label