fix(core): checkbox issue with default value and required validation

[jorgemoya]

What/Why?

• Fixes an issue with the checkbox not properly triggering the required validation.
• Fixes an issue with the checkbox not setting the default value from the API.
• Fixes an issue with the field value being incorrectly set as undefined

Testing

Locally.

Migration

Update the props to set a checked value and pasa an empty string when checked box is unselected.

case 'checkbox':
    return (
    <Checkbox
        checked={controls.value === 'true'}
        errors={formField.errors}
        key={formField.id}
        label={field.label}
        name={formField.name}
        onBlur={controls.blur}
        onCheckedChange={(value) => handleChange(value ? 'true' : '')}
        onFocus={controls.focus}
        required={formField.required}
        value={controls.value ?? ''}
    />
    );

[changeset-bot]

🦋 Changeset detected

Latest commit: 3e2a008

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@bigcommerce/catalyst-core	Patch

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[matthewvolk]

Tested locally, LGTM 👍