unstructured

137ea673 - feat(chunking): add include_orig_elements chunking option (#2649)

feat(chunking): add include_orig_elements chunking option (#2649) **Summary** Add `include_orig_elements: bool = True` as a new chunking option. This PR does not implement _adding_ original elements to chunks, only accepting this parameter as a chunking option and assigning `True` to it as a default value when it is omitted as a keyword argument. Note this will need to be added in other repositories as well in order to fully support this new option by all access methods. In particular it will need to be added in `unstructured-api` in order to become available via the SDKs.