feat: add ts eslint plugin (#688)

examples/mongodb/1_import.ts

examples/mongodb/3_query.ts

examples/multimodal/clip.ts

examples/nodeParser/MarkdownNodeParser.ts

examples/pg-vector-store/load-docs.ts

examples/pinecone-vector-store/load-docs.ts

examples/prompts/promptMixin.ts

examples/qdrantdb/preFilters.ts

examples/readers/src/docx.ts

examples/readers/src/markdown.ts

examples/recipes/cost-analysis.ts

examples/routerQueryEngine.ts

examples/split.ts

packages/core/src/indices/keyword/index.ts

packages/core/src/indices/summary/index.ts

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

packages/core/src/ingestion/strategies/DuplicatesStrategy.ts

packages/core/src/ingestion/strategies/UpsertsStrategy.ts

packages/core/src/objects/base.ts

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