Merge pull request #7 from run-llama/listindex

.gitignore

apps/simple/listIndex.ts

apps/simple/vectorIndex.ts

packages/core/package.json

packages/core/src/BaseIndex.ts

packages/core/src/Prompt.ts

packages/core/src/Retriever.ts

packages/core/src/index/list/ListIndex.ts

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

packages/core/src/index/list/index.ts

packages/core/src/index/list/utils.ts

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

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