Reorganize diagram scripts into scripts/diagrams subdirectory

[SatoryKono]

Summary

Consolidates diagram-related scripts into a dedicated scripts/diagrams/ subdirectory to improve code organization and reduce clutter in the root scripts/ directory. Creates deprecation wrappers in the original locations to maintain backward compatibility during transition.

Changes

• Script reorganization: Moved 15+ diagram validation and processing scripts to scripts/diagrams/:

  • check_diagram_quality_gates.py
  • check_svg_text_visibility.py
  • check_diagram_artifacts.py
  • check_diagram_visual_smoke.py
  • add_svg_text_fallback.py
  • inject_svg_styles.py
  • lint_diagrams.py
  • normalize_node_sizes.py
  • uniform_diagram_sizes.py
  • And others

• Backward compatibility: Created thin deprecation wrappers at original script locations that delegate to the new subdirectory versions

• Documentation: Added scripts/README.md explaining the new layout and consolidation rationale

• CI/workflow updates: Updated GitHub Actions workflows (.github/workflows/docs.yml, diagram-nightly.yml) and Makefile to reference scripts in new location

• Generated artifacts: Added diagram index files (PNG/SVG) and catalog HTMLs for architecture, foundation, class-diagrams, and views diagram sets

Checklist

• Scripts maintain identical functionality (moved, not modified)
• Deprecation wrappers preserve backward compatibility
• CI workflows updated to use new script paths
• No hardcoded secrets or credentials
• Documentation added for new structure

https://claude.ai/code/session_016A29BqCCCnqbBCTyGKKZzS

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