no more a-prefix

apps/simple/chatEngine.ts

packages/core/src/ChatEngine.ts

packages/core/src/Embedding.ts

packages/core/src/LLM.ts

packages/core/src/LLMPredictor.ts

packages/core/src/QueryEngine.ts

packages/core/src/QuestionGenerator.ts

packages/core/src/ResponseSynthesizer.ts

packages/core/src/Retriever.ts

packages/core/src/indices/list/ListIndexRetriever.ts

...ages/core/src/indices/vectorStore/VectorIndexRetriever.ts

packages/core/src/indices/vectorStore/VectorStoreIndex.ts

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

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