Updated files to send to pypi project format with examples

[sei-vsarvepalli]

This will be to help publish our SSVC project tin pypi as a project.

1. The src/ssvc/ project currently has updated with some examples that walk through Decision Point and Decision Table creation with a fictitious WeatherForecast + Humidity (both decision points) will help decide whether to play or not to play (decision table)
2. The repository pyproject.toml is updated to remove deprecated relative_to and add _scheme flags complaint with pypi project.
3. The name of the project is certcc-ssvc as somebody has already registered an alternate ssvc name. Pople will have to install it vase pip install certcc-ssvc
4. When updating the respoitory we will put things in a pypi branch with git tag $(date +%Y.%-m.%-d%H%M) format to auto-build version numbers that will be pushed to pypi project.
5. Currently no CI/CD is setup to take over the project and feed form GitHub ot PyPi (pending).
6. Added a new method known as to_ascii_tree that creates an ascii art version of the decision tree. Example below:

Exploitation.. | Automatable .. | Technical Im.. | Mission and .. | CISA Levels .. | 
-------------------------------------------------------------------------------------
├── none    
│               ├── no    
│               │               ├── partial    
│               │               │               ├── low    
│               │               │               │               └── [track]
│               │               │               ├── medium    
│               │               │               │               └── [track]
│               │               │               └── high    
│               │               │                               └── [track]
│               │               └── total    
│               │                               ├── low    
│               │                               │               └── [track]
│               │                               ├── medium    
│               │                               │               └── [track]
│               │                               └── high    
│               │                                               └── [track*]
│               └── yes    
│                               ├── partial    
│                               │               ├── low    
│                               │               │               └── [track]
│                               │               ├── medium    
│                               │               │               └── [track]
│                               │               └── high    
│                               │                               └── [attend]
│                               └── total    
│                                               ├── low    
│                                               │               └── [track]
│                                               ├── medium    
│                                               │               └── [track]
│                                               └── high    
│                                                               └── [attend]
├── public poc    
│               ├── no    
│               │               ├── partial    
│               │               │               ├── low    
│               │               │               │               └── [track]
│               │               │               ├── medium    
│               │               │               │               └── [track]
│               │               │               └── high    
│               │               │                               └── [track*]
│               │               └── total    
│               │                               ├── low    
│               │                               │               └── [track]
│               │                               ├── medium    
│               │                               │               └── [track*]
│               │                               └── high    
│               │                                               └── [attend]
│               └── yes    
│                               ├── partial    
│                               │               ├── low    
│                               │               │               └── [track]
│                               │               ├── medium    
│                               │               │               └── [track]
│                               │               └── high    
│                               │                               └── [attend]
│                               └── total    
│                                               ├── low    
│                                               │               └── [track]
│                                               ├── medium    
│                                               │               └── [track*]
│                                               └── high    
│                                                               └── [attend]
└── active    
                ├── no    
                │               ├── partial    
                │               │               ├── low    
                │               │               │               └── [track]
                │               │               ├── medium    
                │               │               │               └── [track]
                │               │               └── high    
                │               │                               └── [attend]
                │               └── total    
                │                               ├── low    
                │                               │               └── [track]
                │                               ├── medium    
                │                               │               └── [attend]
                │                               └── high    
                │                                               └── [act]
                └── yes    
                                ├── partial    
                                │               ├── low    
                                │               │               └── [attend]
                                │               ├── medium    
                                │               │               └── [attend]
                                │               └── high    
                                │                               └── [act]
                                └── total    
                                                ├── low    
                                                │               └── [attend]
                                                ├── medium    
                                                │               └── [act]
                                                └── high    
                                                                └── [act]

[sei-vsarvepalli]

The pypi project is currently active at

https://pypi.org/project/certcc-ssvc/2025.9.141724/

[ahouseholder]

We should spawn a follow-on ticket to clarify how things get from the pypi branch to the actual PyPI registry