Aditional languages (rus, ukr) doesn't choosing in OCR language list

[deimjons]

Description Hello. I am using a custom docker image with Russian and Ukrainian language packages for tesseract installed, following instructions: https://docs.papermerge.io/3.0/setup/add-ocr-langs/ Dockerfile:

FROM papermerge/papermerge:3.1

# add Ukrainian and Russian OCR languages
RUN apt install tesseract-ocr-rus tesseract-ocr-ukr

Info:

• Papermerge Version [e.g. 3.1] In the container are added languages:

  # docker exec -it papermerge bash
  # tesseract --list-langs
  List of available languages in "/usr/share/tesseract-ocr/5/tessdata/" (11):
  deu
  eng
  fra
  ita
  nld
  osd
  por
  ron
  rus
  spa
  ukr

  I see these languages in OCR languages list but can not choose and Run OCR

[ciur]

Yes, because "rus" and "ukr" language codes are missing in following places:

• https://github.com/papermerge/papermerge-core/blob/master/ui/src/types.ts#L269
• https://github.com/papermerge/papermerge-core/blob/master/ui/src/cconstants.ts#L10

I would gladly accept your pull request.