Add: document question answering task guide (#21518)

* document question answering guide

* Added the list of supported models

* Apply suggestions from code review
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>

* switched to AutoProcessor

* feedback addressed

* Apply suggestions from code review
Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>

* Update docs/source/en/tasks/document_question_answering.mdx
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>

* more feedback addressed

* addressed comments about evaluation loss

* added appropriate image link

* make style

* typo fix

* resolving toc conflict

* fixed the image link

---------
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: NielsRogge <48327001+NielsRogge@users.noreply.github.com>
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>

docs/source/en/_toctree.yml

@@ -85,6 +85,8 @@
   - sections:
     - local: tasks/image_captioning
       title: Image captioning
+    - local: tasks/document_question_answering
+      title: Document Question Answering
     title: Multimodal
   - sections:
     - local: performance

utils/check_task_guides.py

@@ -73,6 +73,7 @@ TASK_GUIDE_TO_MODELS = {
     "token_classification.mdx": transformers_module.models.auto.modeling_auto.MODEL_FOR_TOKEN_CLASSIFICATION_MAPPING_NAMES,
     "translation.mdx": transformers_module.models.auto.modeling_auto.MODEL_FOR_SEQ_TO_SEQ_CAUSAL_LM_MAPPING_NAMES,
     "video_classification.mdx": transformers_module.models.auto.modeling_auto.MODEL_FOR_VIDEO_CLASSIFICATION_MAPPING_NAMES,
+    "document_question_answering.mdx": transformers_module.models.auto.modeling_auto.MODEL_FOR_DOCUMENT_QUESTION_ANSWERING_MAPPING_NAMES,
 }