Link feature names in architecture.md to feature docs pages.
Add See Also section to configuration.md with related pages.
Add getting-started prerequisite link to deployment.md. Adjust
page weights for user journey sidebar order: Getting Started
(0) → Deployment (1) → Content Organization (2) → Config (3).
Rewrite _index.md as explanation-only — remove inline Quick
Start, add Learn More links. Move section discovery explanation
from features/sections.md into content-organization.md. Slim
sections.md to reference-only with cross-reference.