Initial commit: Lamassu modernization project

- Add lamassu-server, lamassu-machine, lamassu-install as submodules
- Add CLAUDE.md with development guidance
- Add docs/modernization-plan.md with 2026 refactoring roadmap
- Add .gitignore for Node.js/Nix development

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,44 @@
+# Dependencies
+node_modules/
+.pnpm-store/
+
+# Build outputs
+dist/
+build/
+*.tsbuildinfo
+
+# Environment files
+.env
+.env.*
+!.env.example
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Nix
+result
+result-*
+.direnv/
+.devenv/
+.devenv.flake.nix
+
+# Logs
+*.log
+logs/
+
+# Test coverage
+coverage/
+
+# Lamassu specific
+.lamassu/
+*.pem
+*.crt
+*.key