[Docs] update readme and contributing

[nebula-aac]

Task: Update README.md and CONTRIBUTING

• Add some general information on how to get started with using this repo
• Update CONTRIBUTING document specifically to this repo workflow

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Contributor Guides and Resources

• 📚 Instructions for contributing to documentation
  • Meshery documentation site and source
• 🛠 Meshery Build & Release Strategy
• 🎨 Wireframes and designs for Layer5 site in Figma (open invite)
• 🙋🏾🙋🏼 Questions: Layer5 Discussion Forum and Layer5 Community Slack

[akebu6]

@nebula-aac what needs to be done with this issue?

[nebula-aac]

The README is partially done anyway with adding the list of packages, and how to get started.

The contributing will needs to updated but I haven't updated this issue on the ask.

[akebu6]

I'd be up to working on it as long as you tell me what needs to be added

[leecalcote]

@akebu6 there is some discussion on this in the community Slack that you might want to hop into.

[akebu6]

@leecalcote is that in the documentation channel?