Create public website with user, maintainer, and developer docs

[gino-m]

Proposed outline:

• About Ground
  • Background
  • Goal, mission, vision
  • Licensing, community ownership
  • Current state and deployments
• User's guides
  • For survey organizers
  • For data collectors
• App publishers
  • System overview
  • Build, troubleshoot, test, deploy, publish Ground to Play Store
• Contributors
  • Technical overview (architecture)
  • Getting started
  • Web and Android app arch, reference docs, coding and testing best practices
  • Same for Firebase (Authentication, Cloud Functions, Firestore and Storage
    organization and rules), Crashlytics
  • Contributing (creating issues, PRs, etc)
  • Code of conduct
• Maintainers
  • Triaging, reviewing issues & PRs
  • Code of conduct
• Working group
  • Roles, responsibilities, current members, link to code of conduct
  • Processes, incl decision making and planning, incl. life of a ticket (FR, bug, project, or
    other task)
  • Product and UX guidelines
• Steering committee
  • Scope and roles, current members, link to code of conduct
  • Process for charter amendments or major strategic decisions
• 2024 calendar (major events, WG and steering committee meetings)

@jcqli @amegantz @lecrabe please comment here and I'll update this outline accordingly.