docs(audit): align documentation with current behavior

[mchave3]

Summary

Audit and reorganize the Docusaurus documentation around the real Foundry workflow: media authoring in Foundry OSD, runtime execution through Foundry Connect and Foundry Deploy, and post-WinPE handoff.

Reason

The previous navigation was technically usable but fragmented the product journey. Connect and Deploy were split as separate top-level areas, configuration looked like deployment-time behavior instead of pre-build authoring, technical pages were too prominent, and obsolete legacy Autopilot bridge pages remained in the docs tree.

Main changes

• Align deployment pipeline, pre-OOBE priority details, wizard labels, Autopilot permissions, and local WinPE debug guidance with current app behavior.
• Reorganize the sidebar into Start Here, Build Media, Configure Media, Autopilot, Runtime, Reference, and Developer.
• Add Media Authoring Flow to explain how Foundry OSD settings become generated runtime configuration.
• Add Logs and Artifacts as the operator-facing collection point for deployment, Autopilot, and pre-OOBE evidence.
• Move runtime pages under docs/runtime and move the deployment orchestrator into docs/reference.
• Remove obsolete legacy Autopilot bridge pages instead of keeping fallback stubs.
• Keep screenshot placeholders where planned screenshots are still needed.

Testing

• git diff --check
• npm run typecheck
• npm run build

Notes: branch only; not merged or squashed.