Write in a {{tone}} tone. Create a governance plan for building and maintaining a retro/vintage design system in a biotech organization. The audience is e-commerce store owners. Use Supernova as the design tool and Angular as the framework. The goal is to launch a new product. Cover: Design System Mission & Principles, Team Structure & Roles, Contribution Process, Quality Standards, Release & Versioning, Documentation Standards, Adoption & Evangelism, and Roadmap Planning. Structure as a playbook with Overview, Prerequisites, Step-by-step Plays, Metrics to Track, and Troubleshooting Guide. Maximum 1200 words.