* Work started moving converters to individual files.
* Significant cleanup and refactor.
* Moved everything to a packages subfolder.
* Added sample plugin.
* Added instructions to the README.md
* Bumped version, and added a note about compatibility.
* added cli params for doc intel
* added DocumentIntelligenceConverter class implementation
* initialized doc intel client instance field
* added isolated doc_intel main conversion function
* temp fix for ContentFormat import bug
* ran tests for docintel and offline for many filetypes
* push doc intel converter to the top of the stack
* formatting changes
* modified project toml file
