Contributing to Nixpkgs

1st chunk of `doc/contributing.md`

1631aabf440e5719be02f491e8e509a100f60c992d6c36b8000000010000015a

# Contributing to Nixpkgs {#part-contributing}

```{=include=} chapters
contributing/quick-start.chapter.md
contributing/coding-conventions.chapter.md
contributing/submitting-changes.chapter.md
contributing/vulnerability-roundup.chapter.md
contributing/reviewing-contributions.chapter.md
contributing/contributing-to-documentation.chapter.md
```

Title: Contributing to Nixpkgs

Summary

This section provides comprehensive guidelines and information on how to contribute to Nixpkgs. It includes instructions on getting started, coding conventions, submitting changes, handling vulnerabilities, reviewing contributions, and contributing to the documentation.