feat/docx-content-control-fields

[homanp]

Is your feature request related to a problem? Please describe.
Currently content in .docx files that are in content control fields aren't being processed by Unstructured. These fields are commonly used to add valuable metadata, such as headers, to a document.

Describe the solution you'd like
Unstructured should process content in content control fields similarly as it does other elements. Perhaps a new element type would be good.

Describe alternatives you've considered
Unstructured currently relies on a third-party package called docx to handle parsing of content. This lib does not support content control fields. There are other third-party libs that do such as: https://pypi.org/project/docx-form/

[homanp]

@scanny had a chat with @ds-filipknefel about this issue which is currently blocking us. We would be happy to contribute but since the lib you are using to process docx files doesn't support it atm, we would need to add new dependencies.