New Converter Integration: OpenDataLoader PDF

[maxdswain]

Summary and motivation

OpenDataLoader PDF is a widely used PDF parser to prepare extract information to be used in AI/RAG systems. Currently no integration exists for haystack, but one does for langchain.

Detailed design

Create new OpenDataLoaderConverter that acts an interface supporting, input file paths (must be pdfs) as well as haystack ByteStream's and that returns list[Document]. This new component, should support various OpenDataLoader options, including modes and extraction settings.

Checklist

If the request is accepted, ensure the following checklist is complete before closing this issue.
Follow the instructions in https://github.com/deepset-ai/haystack-core-integrations/blob/main/CONTRIBUTING.md#create-a-new-integration and use our scaffolding script for the implementation.

Tasks

• An integration tile with a usage example has been added to https://github.com/deepset-ai/haystack-integrations
• Docs are published at https://docs.haystack.deepset.ai/
• The code is documented with docstrings and was merged in the main branch
• There is a Github workflow running the tests for the integration nightly and at every PR
• A new label named like integration:<your integration name> has been added to the list of labels for this repository
• The labeler.yml file has been updated
• The package has been released on PyPI
• The integration has been listed in the Inventory section of this repo README
• The feature was announced through social media

[Raahim-Lone]

Hi! I'd like to take this integration on if that's okay. I can implement the OpenDataLoaderConverter following the existing Haystack integration patterns, including support for file paths and ByteStream inputs.

[sjrl]

Reopening to finish remaining tasks