docs: align with satware AG best practices

- Delete deprecated CLAUDE.md
- Create root-level AGENTS.md for AI assistant guidance
- Create SDD constitution in .specify/memory/constitution.md
- Align documentation with PARA structure (docs/product/project-brief.md, docs/tech/stack.md, docs/plans/)
- Add standardized YAML frontmatter to all documentation files
- Update README.md with saTway branding and structure

.clinerules/workstation.md

@@ -1,3 +1,15 @@
+---
+description: >-
+  Specific rules and standards for managing the mw-pfeddersheim-workstation
+  infrastructure.
+tags:
+  - workstation
+  - rules
+  - infrastructure
+  - ansible
+last_updated: '2026-03-09'
+---
+
 # Workstation Infrastructure Rules
 
 ## 1. System Changes