fix: vlm using artifacts path

[dolfim-ibm]

Fix the usage of the artifacts path for the vlm models.

This PR might supersede #1051.

Checklist:

• Documentation has been updated, if necessary.
• Examples have been added, if necessary.
• Tests have been added, if necessary.

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[Navanit-git]

I dont think this will take the local file as an input kindly view my code in #1051 you will get to know in which code I have changed and why I reached there

[dolfim-ibm]

I dont think this will take the local file as an input kindly view my code in #1051 you will get to know in which code I have changed and why I reached there

This is leveraged by the pipeline options, basically a snippet like

from docling.datamodel.base_models import InputFormat
from docling.datamodel.pipeline_options import PdfPipelineOptions
from docling.document_converter import DocumentConverter, PdfFormatOption

from docling.datamodel.pipeline_options import granite_picture_description

pipeline_options = PdfPipelineOptions()
pipeline_options.do_picture_description = True
pipeline_options.picture_description_options = PictureDescriptionVlmOptions(
    repo_id="",  # <-- add here the Hugging Face repo_id of your favorite VLM
    prompt="Describe the image in three sentences. Be consise and accurate.",
)
pipeline_options.images_scale = 2.0
pipeline_options.generate_picture_images = True

# use local artifacts
pipeline_options.artifacts_path = "~/.cache/docling/models"  # or other locations where models are located

converter = DocumentConverter(
    format_options={
        InputFormat.PDF: PdfFormatOption(
            pipeline_options=pipeline_options,
        )
    }
)
doc = converter.convert(DOC_SOURCE).document

The same can also be activated via ENV DOCLING_ARTIFACTS_PATH=~/.cache/docling/models

[Navanit-git]

But tell me one thing what if I use repo id for a local folder, where I have stored and downloaded an LLM what will it do next?
Currently I am away from my PC, but if you can download one small vlm and download it in local path and then give its place in repo id then what.

The feature I have added because some of the security systems doesn't allow to store in cache, so we have to store it in a local path. So what next?

See if this artifact can solve it. Also my line of code was way too simple to create new things.