chore(issue-details): Add hook for retention period (#85875)

adds the hook definition needed for
getsentry/getsentry#16615, will add where the
hook is used in a different PR (after we have access to the hook)

static/app/types/hooks.tsx

@@ -341,6 +341,7 @@ export type ReactHooks = {
   ) => React.ContextType<typeof RouteAnalyticsContext>;
   'react-hook:use-button-tracking': (props: ButtonProps) => () => void;
   'react-hook:use-experiment': UseExperiment;
+  'react-hook:use-get-max-retention-days': () => number | undefined;
 };
 
 /**