Initialize repository structure for ML/ONNX demo

[Copilot]

Creates folder structure for Node.js user group demo showcasing scikit-learn to ONNX model conversion workflow.

Changes

• notebooks/ - Python scikit-learn model training and ONNX conversion
• onnxnode/ - onnxruntime-node integration examples
• languagetranslation/ - Language translation demo
• ollamaweb/ - Ollama web integration demo

Each folder includes .gitkeep for git tracking.

Original prompt

I am creating a repo for a demo I am creating for a Node.js user group that is going to demonstrate how you can build a machine learning/ai model in scikit-learn, and convert it into an ONNX model that can be run in the onnxruntime-node. The folder structure will be in the following folder layout:

root
  - notebooks
  - onnxnode
  - languagetranslation
  - ollamaweb

The notebooks folder will have my python code. The rest of the folders will have JavaScript/Node examples.

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