Added Apple Silicon compatibility with onnxruntime

[kevinlacaille]

Closes #15

TL;DR: Replaced requirements.txt with setup.py and allow for Apple Silicon compatibility.

Summary:

I made an important update to the installation process to improve the compatibility of WALDO for Apple Silicon processors.

1. I removed the requirements.txt file and replaced it with a setup.py file, which allows for multiple options for a given dependency. In this case, to ensure compatibility with Apple Silicon, I've replaced the previous onnxruntime-gpu dependency with onnxruntime-silicon, which can be found on PyPI here.
   • Please feel free to change or ask for revisions to any of the parameters in the setup function (i.e., description, classifiers, etc.)
2. I updated the README to reflect these changes and provide clear instructions on how to install the project.

[stephansturges]

Awesome, thanks!