[Meta] Update docs outline

[scottrigby]

This issue is to track desired updates to the top-level docs outline, which was covered in today's meeting with @pzfreo @bia @jrryjcksn @scottrigby.

These issues below are all well-formatted & actionable, so that team members can take them on in parallel. This issue will depend on those others for completion.

• Update intro text #48
• Flesh out Guides #50
• Can/should Weave GitOps manage the CRD lifecycle? If not, how do it's users do that? #51

Outline

Here are maps between the desired and current outlines:

Map: (meeting outline -> to current docs)

• Intro -> introduction
• Start now -> getting started
• Guides -> Examples
• Cli ref -> cli ref
• What’s coming -> add simple language on this to the intro (see far below)
• FAQ -> Need to add
• Follow -> HOLD (can link to Weave GitOps marketing page on WW website when it’s ready)

Map: (current docs -> meeting outline)

• Architecture -> REMOVE for now based on today’s meeting? Concepts are simply added to intro for now
• Troubleshooting -> KEEP as-is. Maybe link to support from there “if you’ve tried all of the above and still have probs, feel free to contact WW support at …”
• Examples -> Guides
• GitOps Automation Configuration -> Getting Started/Configuration (later add to top-level in guides for more advanced configuration, once we have more content for it)