Add ONNXWrapper

Ported the ONNXWrapper class from TopCPToolkit, and adapted it for FastFrames.

An example of using this class is available here: https://gitlab.cern.ch/dbiswas/SAJAEvaluator/-/tree/with-onnxwrapper

This requires onnxruntime, which will be available in StatAnalysis 0.4 release. The nightly builds will be available from tomorrow (21-Jun-2024).

Meanwhile, one can use them using:

docker run --rm --pull always -e DISPLAY=host.docker.internal:0 -it gitlab-registry.cern.ch/atlas/statanalysis:main-onnxruntime

or

singularity run docker://gitlab-registry.cern.ch/atlas/statanalysis:main-onnxruntime