fix: Enable HTML export in CLI and add options for image mode (#513)

* updated README

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

* removed duck in title

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

* updated the index.md

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

* updated the cli to export html

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

* added html to cli

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

* reformatted the code

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

* removed the duck emoji, added the  in the cli. Currently, the referenced seems broken

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

* cleaning up the comments

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

* reference is now working

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

* Clean up styling and docs

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

* Pin docling-core>=2.7.1

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

---------

Signed-off-by: Peter Staar <taa@zurich.ibm.com>
Signed-off-by: Christoph Auer <cau@zurich.ibm.com>
Co-authored-by: Christoph Auer <cau@zurich.ibm.com>

docs/index.md

@@ -18,7 +18,7 @@ Docling parses documents and exports them to the desired format with ease and sp
 
 ## Features
 
-* 🗂️ Reads popular document formats (PDF, DOCX, PPTX, XLSX, Images, HTML, AsciiDoc & Markdown) and exports to Markdown and JSON
+* 🗂️ Reads popular document formats (PDF, DOCX, PPTX, XLSX, Images, HTML, AsciiDoc & Markdown) and exports to HTML, Markdown and JSON (with embedded and referenced images)
 * 📑 Advanced PDF document understanding incl. page layout, reading order & table structures
 * 🧩 Unified, expressive [DoclingDocument](./concepts/docling_document.md) representation format
 * 🤖 Easy integration with 🦙 LlamaIndex & 🦜🔗 LangChain for powerful RAG / QA applications