refs https://github.com/TryGhost/Product/issues/3832
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### <samp>🤖 Generated by Copilot at 0095d23</samp>
The pull request adds support for asynchronous and creatable select
inputs in various components, using the `react-select` and
`@tanstack/react-query` libraries. It also adds pagination features to
the newsletters and tiers lists, using a `Button` component and infinite
queries. It refactors and fixes the type and null handling of the select
inputs and their options, using the `SelectOption` type and the
`useFilterableApi` and `debounce` hooks. It removes some unnecessary
props from the browse queries, and adds a new custom hook
`useDefaultRecipientsOptions` for the default recipients component. It
updates the stories and modals to use the new select inputs and options.
refs https://github.com/TryGhost/Product/issues/3349
- Simplified a few more places after switching to react-query
- Improved how mocking works in specs to be more scalable as the number
of queries increases
refs. https://github.com/TryGhost/Product/issues/3349
- applied outline and fixed spacing for form groups
- small UI refinements for static version of Newsletter settings
- replaced textareas with textfields in site description, twitter and FB descriptions
- unified pattern for "Save & close" and "Cancel" in user detail settings
- refined checked background for logo container in Design settings
- refined spacing in Tier detail modal
- fixed gradient bug in Portal preview
- fixed UI bugs in Portal / Links
- fixed tier dropdown bug in Portal / Links. It was always showing links for the first tier
- unified form input element headings
- refined checkbox and toggle label typography and spacing
