feat: Support AsciiDoc and Markdown input format

README.md

@@ -94,5 +94,5 @@ If you use Docling in your projects, please consider citing the following:
 
 ## License
 
-The Docling codebase is under MIT license.
+The Docling codebase is under MIT license. 
 For individual model usage, please refer to the model licenses found in the original packages.

docling/backend/abstract_backend.py

@@ -13,6 +13,7 @@
 class AbstractDocumentBackend(ABC):
     @abstractmethod
     def __init__(self, in_doc: "InputDocument", path_or_stream: Union[BytesIO, Path]):
+        self.file = in_doc.file
         self.path_or_stream = path_or_stream
         self.document_hash = in_doc.document_hash
         self.input_format = in_doc.format