Modernize Python package build system: Migrate to pyproject.toml

Current Status

The project currently uses an outdated package build configuration based on setup.py with several issues:

• Using outdated Python package build system (setup.py)
• Conflicting and outdated dependency specifications across multiple files
• Support for EOL Python versions
• Incomplete package requirements configuration
• Outdated development and testing dependencies

Proposed Changes

1. Migration to Modern Build System

• Replace setup.py, setup.cfg with pyproject.toml
• Implement modern build backend using uv, hatchling orpoetry-core
• Define clear dependency groups for runtime, development, and testing

2. Dependencies Cleanup

• Move all runtime dependencies from requirements.txt to pyproject.toml
• Update minimum Python version requirement to 3.10+
• Resolve conflicting package versions
• Remove support for EOL Python versions
• Update all development dependencies to current versions

3. Testing and CI Updates

• Modernize tox configuration for current Python versions (3.10-3.12)
• Update testing tools:
  • pytest >= 7.0
  • coverage >= 7.0
  • tox >= 4.0
• Add proper test coverage configuration
• Add GitHub Actions workflow for CI