revert "remove shim-types imports in custom code"

This reverts commit 00458ac.

Author: stainless-em

src/lib/AssistantStream.ts

@@ -18,6 +18,7 @@ import {
   RunSubmitToolOutputsParamsBase,
   RunSubmitToolOutputsParamsStreaming,
 } from '../resources/beta/threads/runs/runs';
+import { type ReadableStream } from '../internal/shim-types';
 import { Stream } from '../streaming';
 import { APIUserAbortError, OpenAIError } from '../error';
 import {

src/lib/ChatCompletionStream.ts

@@ -17,6 +17,7 @@ import {
   AbstractChatCompletionRunner,
   type AbstractChatCompletionRunnerEvents,
 } from './AbstractChatCompletionRunner';
+import { type ReadableStream } from '../internal/shim-types';
 import { Stream } from '../streaming';
 import OpenAI from '../index';
 import { ParsedChatCompletion } from '../resources/chat/completions';

src/lib/ChatCompletionStreamingRunner.ts

@@ -3,6 +3,7 @@ import {
   type ChatCompletionCreateParamsStreaming,
 } from '../resources/chat/completions';
 import { RunnerOptions, type AbstractChatCompletionRunnerEvents } from './AbstractChatCompletionRunner';
+import { type ReadableStream } from '../internal/shim-types';
 import { RunnableTools, type BaseFunctionsArgs } from './RunnableFunction';
 import { ChatCompletionSnapshot, ChatCompletionStream } from './ChatCompletionStream';
 import OpenAI from '../index';