[Docs] Schema-driven docs

[leecalcote]

Current State

This repo's readme doesn't contain instructions on how to make changes to definitions or schemas or utilities.

Desired State

1. Brief description of the difference between these things.
2. Links to other docs that describe how to contribute in these areas.
3. What process to follow for MeshKit updates, like this Bump github.com/layer5io/meshkit from 0.7.50 to 0.7.72 #166

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Contributor Guides and Handbook

• 📚 Instructions for contributing to documentation
  • Meshery documentation site and source
• 🛠 Meshery Build & Release Strategy
• 🎨 Wireframes and designs for Meshery UI in Figma (open invite)
• 🙋🏾🙋🏼 Questions: Discussion Forum and Community Slack