Create the CallbackManager with onLLMStream and onRetrieve

package.json

packages/core/src/GlobalsHelper.ts

packages/core/src/LLMPredictor.ts

packages/core/src/LanguageModel.ts

packages/core/src/QueryEngine.ts

packages/core/src/ResponseSynthesizer.ts

packages/core/src/Retriever.ts

packages/core/src/ServiceContext.ts

packages/core/src/callbacks/CallbackManager.ts

packages/core/src/callbacks/utility/aHandleOpenAIStream.ts

packages/core/src/tests/CallbackManager.test.ts

packages/core/src/tests/Streaming.test.ts

packages/core/src/tests/__fixtures__/paulGrahamEssay.ts

packages/core/src/tests/jj_raw_tests.js

packages/core/src/tests/utility/mockOpenAI.ts

pnpm-lock.yaml