Documentation 2.0

A re-architected documentation site with cleaner navigation and dedicated space for the new surface areas TofuPilot ships against.

• Reorganized the sidebar around what you actually use day-to-day. Top groups now flow from "Getting started" and "Fundamentals" into product surfaces: Frameworks (TofuPilot, OpenHTF, Pytest, Robot), API & SDKs (Python, C#, Rust, C++, MATLAB, REST), CLI, AI, Analytics, Deployments, Integrations, Inventory, Station, Access, Security, Pricing, Self-hosting
• Replaced the flat dump of pages with grouped sections, so framework-specific guidance, SDK references, and integration setups each live under their own dedicated group instead of sharing one bucket
• Added per-resource sub-sections so growing surface areas (every CLI command, every REST endpoint, every Station toggle) have their own page instead of being concatenated
• Added a Preview badge and banner so features still rolling out (AI, Slack, InvenTree, Reports, Insights, Failure Analysis, Rolling Rollout, Instant Rollback) are clearly flagged