[Feature]: Re-export date types

[hywax]

Describe the feature

We need additional types that exist in reka, but they are not exported.

Currently, to create components, we have to write:

type SegmentPart = Parameters<InstanceType<typeof DateField.Root>['$slots']['default'] & {}>[0]['segments']

We want to simply export this type from reka:

import type { SegmentPart } from 'reka-ui'
// or
import type { SegmentPart } from 'reka-ui/date'

We just need to add a re-export in this file: https://github.com/unovue/reka-ui/blob/v2/packages/core/src/shared/index.ts

Example https://github.com/nuxt/ui/pull/5387/files#diff-a4d45f82f4fece61efb56bf8d30b32b59105822f0da68565ddae277700bf3afaR98-R102

Additional information

• I intend to submit a PR for this feature.
• I have already implemented and/or tested this feature.