add onnx-gpu

[michaelfeil]

adding optional onnx-gpu
Closes #30

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bf9e10d) 91.04% compared to head (6b0f8c0) 90.75%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #26      +/-   ##
==========================================
- Coverage   91.04%   90.75%   -0.30%     
==========================================
  Files          18       18              
  Lines         648      649       +1     
==========================================
- Hits          590      589       -1     
- Misses         58       60       +2     

Files	Coverage Δ
...infinity_emb/infinity_emb/transformer/fastembed.py	84.61% <100.00%> (+0.40%)	⬆️

... and 1 file with indirect coverage changes

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