chore: cut release for image processing

[qued]

Prepping release I realized some changes I thought I'd made never got in.

• Added is_image flag for process_data_with_model and process_file_with_model
• Added support for the above in the API
• Added testing for all of the above

Testing:

Run from python terminal:

from unstructured_inference.inference.layout import process_file_with_model

res = process_file_with_model('sample-docs/loremipsum.png', is_image=True)
res.pages[0].elements
print(res)

The output should show that several Text elements were found.

Run make run-app-dev and from a separate terminal make the following request:

curl -X 'POST' \
  'http://localhost:8000/layout/image' \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -F 'file=@sample-docs/loremipsum.png' | jq -C . | less -R

The output should show that several Text elements were found.

[MthwRobinson]

LGTM! Just note that I had to change the process_file_with_model line to the following in the test instructions for it to work:

res = process_file_with_model(filename='sample-docs/loremipsum.png', model_name=None, is_image=True)