refs https://github.com/TryGhost/Product/issues/4147
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### <samp>🤖 Generated by Copilot at b18d725</samp>
This pull request adds the functionality to create new offers for
members in the admin-x-settings app. It uses custom hooks to handle the
form logic and the API mutation, and updates the type definitions and
the UI components accordingly. It also modifies the `offers.ts` file in
the admin-x-framework to support the new feature.
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Co-authored-by: Chris Raible <chris@ghost.org>
Co-authored-by: Sodbileg Gansukh <sodbileg.gansukh@gmail.com>
452e702530