fix: ensure useSuspenseQuery data type does not include undefined

[isoppp]

Summary

• Remove undefined from useSuspenseQuery data type
• Generate type definitions that comply with TanStack Query's official specification

Fixes #181

Changes

Type Fixes

• Add UseSuspenseQueryOptions import
• Wrap DefaultResponse type with NonNullable for suspense queries
• Use UseSuspenseQueryOptions for suspense query options parameter

Generated Code Changes

Before:

export const useFindPetsSuspense = <
  TData = Common.FindPetsDefaultResponse,  // includes undefined
  ...
>(
  options?: Omit<UseQueryOptions<TData, TError>, ...>,
) => ...

After:

export const useFindPetsSuspense = <
  TData = NonNullable<Common.FindPetsDefaultResponse>,  // excludes undefined
  ...
>(
  options?: Omit<UseSuspenseQueryOptions<TData, TError>, ...>,
) => ...

Why NonNullable?

useSuspenseQuery enforces throwOnError: true, so errors are thrown and caught by ErrorBoundary. This means data is guaranteed to be defined when the component renders. Wrapping with NonNullable removes undefined from the type while maintaining consistency with the existing Common.* type reference pattern.

How to Test

• Run pnpm build
• Run pnpm vitest run
• Run pnpm run generate:api && pnpm run test:generated in examples/react-app
• Verify generated suspense hooks allow data.map() without optional chaining

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