* Add custom text types and recursive
* Add custom text types and recursive
* Fix format
* Update qdrant, Add pdf to unstructured
* Use unstructed as the default text extractor if installed
* Add tests for unstructured
* Update tests env for unstructured
* Fix error if last message is a function call, issue #569
* Remove csv, md and tsv from UNSTRUCTURED_FORMATS
* Update docstring of docs_path
* Update test for get_files_from_dir
* Update docstring of custom_text_types
* Fix missing search_string in update_context
* Add custom_text_types to notebook example