feat: integrate with docling (#471) bump:patch

* feat: add docling reader implementation

* feat: expose docling to UI

* fix: improve docling output parsing

* docs: update README

---------

Co-authored-by: Tadashi <tadashi@cinnamon.is>

libs/ktem/ktem/index/file/pipelines.py

@@ -39,6 +39,7 @@ from kotaemon.indices.ingests.files import (
     KH_DEFAULT_FILE_EXTRACTORS,
     adobe_reader,
     azure_reader,
+    docling_reader,
     unstructured,
     web_reader,
 )
@@ -673,6 +674,8 @@ class IndexDocumentPipeline(BaseFileIndexIndexing):
             readers[".pdf"] = adobe_reader
         elif self.reader_mode == "azure-di":
             readers[".pdf"] = azure_reader
+        elif self.reader_mode == "docling":
+            readers[".pdf"] = docling_reader
 
         dev_readers, _, _ = dev_settings()
         readers.update(dev_readers)
@@ -692,6 +695,7 @@ class IndexDocumentPipeline(BaseFileIndexIndexing):
                         "Azure AI Document Intelligence (figure+table extraction)",
                         "azure-di",
                     ),
+                    ("Docling", "docling"),
                 ],
                 "component": "dropdown",
             },