Currently, the default header for the file is produced as
# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).`
We should support the following:
- Repo metadata-based header
- Custom header section, passed in as a string, markdown, or plaintext file