feat: add `AzureCosmosDBNoSqlVectorStore` and `SimpleCosmosDBReader` (#1331)

.changeset/metal-cameras-argue.md

examples/cosmosdb/addPlainData.ts

examples/cosmosdb/loadVectorData.ts

examples/cosmosdb/queryVectorData.ts

examples/data/shortStories.json

examples/package.json

packages/llamaindex/package.json

packages/llamaindex/src/readers/index.ts

...maindex/src/vector-store/AzureCosmosDBNoSqlVectorStore.ts

packages/llamaindex/src/vector-store/index.ts

...ndex/tests/mocks/TestableAzureCosmosDBNoSqlVectorStore.ts

packages/llamaindex/tests/package.json

packages/llamaindex/tests/utility/mockCosmosClient.ts

...s/vector-stores/AzureCosmosDBNoSqlVectorStore.int.test.ts

...tests/vector-stores/AzureCosmosDBNoSqlVectorStore.test.ts

packages/readers/cosmosdb/package.json

packages/readers/package.json

packages/readers/src/cosmosdb.ts

pnpm-lock.yaml

unit/package.json