Add CLAUDE.md, MkDocs docs, .claude/rules

- CLAUDE.md: Comprehensive documentation for Lehrer KI platform
- docs-src: Klausur, Voice, Agent-Core, KI-Pipeline docs
- mkdocs.yml: Lehrer-specific nav with blue theme
- docker-compose: Added docs service (port 8010, profile: docs)
- .claude/rules: testing, docs, open-source, abiturkorrektur, vocab-worksheet, multi-agent, experimental-dashboard

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

mkdocs.yml

@@ -0,0 +1,81 @@
+site_name: BreakPilot Lehrer - Dokumentation
+site_url: https://macmini:8010
+docs_dir: docs-src
+site_dir: docs-site
+
+theme:
+  name: material
+  language: de
+  palette:
+    - scheme: default
+      primary: blue
+      accent: blue
+      toggle:
+        icon: material/brightness-7
+        name: Dark Mode
+    - scheme: slate
+      primary: blue
+      accent: blue
+      toggle:
+        icon: material/brightness-4
+        name: Light Mode
+  features:
+    - search.highlight
+    - search.suggest
+    - navigation.tabs
+    - navigation.sections
+    - navigation.expand
+    - navigation.top
+    - content.code.copy
+    - toc.follow
+
+plugins:
+  - search:
+      lang: de
+
+markdown_extensions:
+  - admonition
+  - pymdownx.details
+  - pymdownx.superfences:
+      custom_fences:
+        - name: mermaid
+          class: mermaid
+          format: !!python/name:pymdownx.superfences.fence_code_format
+  - pymdownx.tabbed:
+      alternate_style: true
+  - pymdownx.highlight:
+      anchor_linenums: true
+  - pymdownx.inlinehilite
+  - pymdownx.snippets
+  - tables
+  - attr_list
+  - md_in_html
+  - toc:
+      permalink: true
+
+nav:
+  - Start: index.md
+  - Services:
+    - KI-Daten-Pipeline:
+      - Uebersicht: services/ki-daten-pipeline/index.md
+      - Architektur: services/ki-daten-pipeline/architecture.md
+    - Klausur-Service:
+      - Uebersicht: services/klausur-service/index.md
+      - BYOEH Architektur: services/klausur-service/BYOEH-Architecture.md
+      - BYOEH Developer Guide: services/klausur-service/BYOEH-Developer-Guide.md
+      - NiBiS Pipeline: services/klausur-service/NiBiS-Ingestion-Pipeline.md
+      - OCR Labeling: services/klausur-service/OCR-Labeling-Spec.md
+      - OCR Vergleich: services/klausur-service/OCR-Compare.md
+      - RAG Admin: services/klausur-service/RAG-Admin-Spec.md
+      - Worksheet Editor: services/klausur-service/Worksheet-Editor-Architecture.md
+    - Voice-Service:
+      - Uebersicht: services/voice-service/index.md
+    - Agent-Core:
+      - Uebersicht: services/agent-core/index.md
+  - Architektur:
+    - Multi-Agent System: architecture/multi-agent.md
+    - Zeugnis-System: architecture/zeugnis-system.md
+  - Entwicklung:
+    - Testing: development/testing.md
+    - Dokumentation: development/documentation.md
+    - CI/CD Pipeline: development/ci-cd-pipeline.md