feat: Add comprehensive hello.py with Python scripting examples

[open-swe]

Fixes #392

Description

This pull request adds a comprehensive hello.py script to the project root, showcasing a wide range of Python programming and machine learning capabilities. The script includes:

Key Features

• Basic Python operations and data structures
• Data manipulation with NumPy and Pandas
• Machine learning examples using Scikit-learn
• Data visualization with Matplotlib and Seaborn
• File I/O operations
• Conceptual Libra usage demonstrations

Highlights

• Multiple function examples demonstrating various libraries
• Comprehensive code covering:
  • List/dictionary comprehensions
  • String manipulation
  • NumPy and Pandas data processing
  • Machine learning model examples
  • Visualization techniques
  • File handling

Generated Outputs

• Visualization files in output/ directory
• Sample data files (CSV, JSON, txt)
• Demonstration of ML workflow components

The script provides a robust starting point for exploring Python programming and machine learning concepts within the project.