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

docs/learnings/2026-02-27-workstation-organization.md

@@ -1,7 +1,13 @@
 ---
-description: Learnings from workstation cleanup and project organization
-tags: [workstation, cleanup, git, disk-usage]
-last_updated: 2026-02-27
+description: >-
+  Learnings from workstation cleanup, disk space optimization, and Git 
+  repository organization.
+tags:
+  - workstation
+  - cleanup
+  - git
+  - disk-usage
+last_updated: '2026-02-27'
 ---
 
 # Workstation Organization