feat: initial Claude Code configuration scaffold

Comprehensive Claude Code guidance system with:

- 5 agents: tdd-guardian, code-reviewer, security-scanner, refactor-scan, dependency-audit
- 18 skills covering languages (Python, TypeScript, Rust, Go, Java, C#),
  infrastructure (AWS, Azure, GCP, Terraform, Ansible, Docker/K8s, Database, CI/CD),
  testing (TDD, UI, Browser), and patterns (Monorepo, API Design, Observability)
- 3 hooks: secret detection, auto-formatting, TDD git pre-commit
- Strict TDD enforcement with 80%+ coverage requirements
- Multi-model strategy: Opus for planning, Sonnet for execution (opusplan)

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

.gitignore

@@ -0,0 +1,112 @@
+# OS files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+*.swp
+*.swo
+*~
+
+# VS Code
+.vscode/
+*.code-workspace
+
+# JetBrains IDEs
+.idea/
+*.iml
+
+# Node.js
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.npm
+.yarn/cache
+.pnp.*
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+.venv/
+venv/
+ENV/
+.env
+.env.local
+.env.*.local
+*.pyc
+
+# Rust
+target/
+Cargo.lock
+**/*.rs.bk
+
+# Coverage reports
+coverage/
+*.lcov
+.nyc_output/
+htmlcov/
+.coverage
+.coverage.*
+coverage.xml
+*.cover
+*.coverage
+
+# Build outputs
+dist/
+build/
+out/
+*.js.map
+
+# Terraform
+.terraform/
+*.tfstate
+*.tfstate.*
+*.tfvars
+!example.tfvars
+.terraform.lock.hcl
+
+# Ansible
+*.retry
+
+# Secrets (NEVER commit these)
+*.pem
+*.key
+secrets.yml
+secrets.yaml
+credentials.json
+.env.production
+
+# Logs
+logs/
+*.log
+
+# Temporary files
+tmp/
+temp/
+*.tmp
+*.temp
+
+# Test artifacts
+test-results/
+playwright-report/