docs: teach Workstation with an organized Docusaurus handbook

[DominicVonk]

Publish an organized Docusaurus handbook at https://dovocode.github.io/workstation/ that teaches Workstation from first setup through daily operations and advanced integrations.

• Add a six-section learning path, local full-text search, chapter navigation, responsive styling, and light/dark themes.
• Explain reconciliation, pins, ownership, file policies, and the choice between resources, tasks, hooks, and health checks. Include a complete developer-workstation walkthrough and a runnable custom-tool tutorial.
• Consolidate resource recipes and keep the generated TypeScript API under /api/. Redirect previously published guide/API URLs so existing bookmarks continue working.
• Keep site dependencies in a private pnpm workspace and publish only static output through the existing guarded pnpm docs:publish command. Source pushes alone do not publish.

Validation: frozen dependency installation, pnpm check, package build, production docs build, and the full quality gate pass (337 tests; six optional container tests skipped). All 52 TypeScript examples type-check; the custom-tool lifecycle runs in an isolated temporary home; the developer configuration resolves on Linux/macOS. Checked generated HTML links/assets, local search data, edit links, and page/redirect coverage for all 117 previously published HTML URLs. No real workstation package/service mutations were performed during validation.