Merge pull request #5 from run-llama/nodev3

apps/simple/index.ts

apps/simple/lowlevel.ts

packages/core/src/BaseIndex.ts

packages/core/src/Document.ts

packages/core/src/LLMPredictor.ts

packages/core/src/LanguageModel.ts

packages/core/src/Node.ts

packages/core/src/NodeParser.ts

packages/core/src/Prompt.ts

packages/core/src/Reader.ts

packages/core/src/Response.ts

packages/core/src/Retriever.ts

packages/core/src/readers/PDFReader.ts

packages/core/src/readers/SimpleDirectoryReader.ts

packages/core/src/storage/FileSystem.ts

packages/core/src/storage/docStore/KVDocumentStore.ts

packages/core/src/storage/docStore/SimpleDocumentStore.ts

packages/core/src/storage/docStore/types.ts

packages/core/src/storage/docStore/utils.ts

packages/core/src/storage/kvStore/SimpleKVStore.ts