auc churts added Tarık Tuna Taşaltı

[tekup99]

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[tekup99]

Initially, I submitted small PRs, but due to conflicts with the updated upstream, I had to force push to resolve them. As a result, my previous commits were removed, and instead of a small PR, a larger one was created.

In this update, AUC charts were added to the following scripts within the capstone project:

• broadband_xgboost.py → Saved in the broadband_results folder
• postpaid_xgboost.py → Saved in the postpaid_results folder
• prepaid_xgboost.py → Saved in the prepaid_results folder

The generated visualizations are saved in each model's respective results folder.

Moving forward, the next commits will be much smaller, as the major conflict resolution is now complete.