export runner options type

[sarptandoven]

summary

• export RunnerOptions from the public package and chat completions resource surfaces
• expose the type on the OpenAI namespace for parity with other chat completion types
• add a type regression covering root and resource imports

change

• openai now supports import type { RunnerOptions } from "openai"
• openai/resources/chat/completions now supports import type { RunnerOptions } ...
• OpenAI.RunnerOptions is available in the root namespace

why
runTools already accepts RunnerOptions internally, but users could not name the options type from public exports when configuring maxChatCompletions.

fixes #593

tests

• pnpm exec tsc --noEmit --pretty false
• pnpm exec jest tests/runner-options-exports.test.ts --runInBand
• pnpm lint