Add question answering to inference client

[martinbrose]

Add question-answering to HuggingFace🤗 Hub

References #1539

This is an ongoing list of model tasks to implement in the Hugging Face Hub inference client. Each task is planned to be its own PR. The task for this is question-answering.

Key Features

• Modifies _client.py to call a question-answering model.
• Modifies testing and documentation to reflect changes.

[HuggingFaceDocBuilderDev]

The documentation is not available anymore as the PR was closed or merged.

[codecov]

Codecov Report

Patch coverage: 76.92% and project coverage change: -0.52% ⚠️

Comparison is base (c716714) 82.31% compared to head (56b314c) 81.79%.
Report is 1 commits behind head on main.

❗ Current head 56b314c differs from pull request most recent head 839a3a0. Consider uploading reports for the commit 839a3a0 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1609      +/-   ##
==========================================
- Coverage   82.31%   81.79%   -0.52%     
==========================================
  Files          62       60       -2     
  Lines        6984     6790     -194     
==========================================
- Hits         5749     5554     -195     
- Misses       1235     1236       +1     

Files Changed	Coverage Δ
...gingface_hub/inference/_generated/_async_client.py	58.37% <25.00%> (+0.33%)	⬆️
src/huggingface_hub/inference/_client.py	79.51% <100.00%> (-0.30%)	⬇️
src/huggingface_hub/inference/_types.py	96.15% <100.00%> (-0.15%)	⬇️

... and 8 files with indirect coverage changes

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[Wauplin]

Perfect job!

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint.