Update Noirjs pages

[critesjosh]

Description

Some proposed changes to noirjs docs pages.

• I added table formatting to the reference section
• removed the instantiate function since its not exposed and its unnecessary
• made the guide 1 page instead of 2 (does it need to be 2 pages?)
• removed yarn create as a suggestion because it didnt work for me
• update node install link to NVM

Problem*

Resolves

Summary*

Additional Context

PR Checklist*

• [ ] I have tested the changes locally.
• [ ] I have formatted the changes with Prettier and/or cargo fmt on default settings.

[netlify[bot]]

✅ Deploy Preview for noir-docs ready!

Name	Link
🔨 Latest commit	d267abf9d6e72d614ab80f7f71cb8ac53d27e77d
🔍 Latest deploy log	https://app.netlify.com/sites/noir-docs/deploys/651ee5bbe81fc10008d9422f
😎 Deploy Preview	https://deploy-preview-394--noir-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[critesjosh]

Should this be added to version 0.10.5 of the docs, or only dev?