Modernize Documentation Theme with Furo

[lighting9999]

Feature description

I suggestion this project's pages use furo theme.

use method

# pyproject.toml  
[project.optional-dependencies]  
docs = [  
    "sphinx>=7.0",  
    "furo>=2024.1.29",  # Modern theme  
    "sphinx-copybutton>=0.5.2"  # Optional UX enhancer  
]  

# docs/conf.py  
html_theme = "furo"  
html_theme_options = {  
    "source_repository": "https://github.com/your/repo/",  
    "source_branch": "main",  
    "source_directory": "docs/",  
}  

I'm ready to give this pull requests to Update.