fix: add extra for CPU onnx

Apparently, optional = true only works if there is an extras package
that installs the dependency. Adding this additional extra makes it so
that onnxruntime and onnxruntime-gpu are not both installed together.

Signed-off-by: Travis Johnson <[email protected]>

Author: tjohnson31415

server/poetry.lock

@@ -34,6 +34,7 @@ cryptography = ">=41.0.3"
 [tool.poetry.extras]
 accelerate = ["accelerate"]
 bnb = ["bitsandbytes"]
+onnx = ["optimum", "onnxruntime", "onnx"]
 onnx-gpu = ["optimum", "onnxruntime-gpu", "onnx"]
 
 [tool.poetry.group.dev.dependencies]