feat: Add granite-docling model (#2272)

* adding granite-docling preview

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* updated the model specs

Signed-off-by: Peter Staar <taa@zurich.ibm.com>

* typo

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* use granite-docling and add to the model downloader

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* update docs and README

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* Update final repo_ids for GraniteDocling

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Update final repo_ids for GraniteDocling

Signed-off-by: Christoph Auer <cau@zurich.ibm.com>

* Fix model name in CLI usage example

Signed-off-by: Christoph Auer <60343111+cau-git@users.noreply.github.com>

* Fix VLM model name in README.md

Signed-off-by: Christoph Auer <60343111+cau-git@users.noreply.github.com>

---------

Signed-off-by: Peter Staar <taa@zurich.ibm.com>
Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>
Signed-off-by: Christoph Auer <cau@zurich.ibm.com>
Signed-off-by: Christoph Auer <60343111+cau-git@users.noreply.github.com>
Co-authored-by: Peter Staar <taa@zurich.ibm.com>
Co-authored-by: Michele Dolfi <dol@zurich.ibm.com>

docs/index.md

@@ -28,7 +28,7 @@ Docling simplifies document processing, parsing diverse formats — including ad
 * 🔒 Local execution capabilities for sensitive data and air-gapped environments
 * 🤖 Plug-and-play [integrations][integrations] incl. LangChain, LlamaIndex, Crew AI & Haystack for agentic AI
 * 🔍 Extensive OCR support for scanned PDFs and images
-* 👓 Support of several Visual Language Models ([SmolDocling](https://huggingface.co/ds4sd/SmolDocling-256M-preview))
+* 👓 Support of several Visual Language Models ([GraniteDocling](https://huggingface.co/ibm-granite/granite-docling-258M))
 * 🎙️  Support for Audio with Automatic Speech Recognition (ASR) models
 * 🔌 Connect to any agent using the [Docling MCP](https://docling-project.github.io/docling/usage/mcp/) server
 * 💻 Simple and convenient CLI