docs: sd-input docs [skip chromatic]

[auroraVasconcelos]

Description:

Definition of Reviewable:

• [ ] Documentation is created/updated
• [ ] Migration Guide is created/updated
• [ ] E2E tests (features, a11y, bug fixes) are created/updated
• [ ] Stories (features, a11y) are created/updated
• [ ] relevant tickets are linked

[coraliefeil]

Pattern Use the "pattern" attribute to use a regular expression to validate the input.

[coraliefeil]

I’ve updated figma to match code ...

Approved.