feat(TaskProcessing): Add OCR TaskType

[marcelklehr]

Summary

Adds a task processing task type for doing OCR

TODO

• Ideas for more inputs?

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) will be updated once the PR is merged
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

[janepie]

Looks good! We could add an input for the language to be extracted and have it default to automatic detection, or add that as optional input only for providers that make use of it. Both fine for me, wdyt @julien-nc @kyteinsky ?

[julien-nc]

Not sure the OCR libraries take a "language" param to help them perform an optimal extraction. @marcelklehr Do they?
If so, I'm ok with adding an input field. It's also fine to let the providers add an optional one as not all the providers might support the param.

[marcelklehr]

Not sure the OCR libraries take a "language" param to help them perform an optimal extraction. @marcelklehr Do they?

The latest models don't require a language input, but older libraries like tesseract may require this. I think an optional input is fine.