feat(DevX): add Makefile with comprehensive build automation

[elifarley]

Add modern Makefile with smart features and excellent developer UX:

Build System Features:

• Strict shell flags for safer execution (.ONESHELL, -eu -o pipefail)
• Smart tool detection (UV, Docker, Gum) with helpful error messages
• Auto-detection of available tools with graceful fallbacks

Quality & Testing Targets:

• make quick-check: Fast checks (format + lint, skip type-check)
• make security-check: Security vulnerability scanning with bandit
• make validate: Fast validation (quick-check + quick tests)
• make check: Full quality checks (lint + type-check)
• make test, test-unit, test-integration: Comprehensive test suite
• make coverage: Test coverage reporting

Development Workflow:

• make watch: Auto-run tests on file changes (TDD workflow)
• make dev: Start development server
• make deps-check: Check for outdated dependencies
• make env-template: Generate .env configuration template

Docker Integration:

• make docker-build, docker-up, docker-down: Container management
• make docker-clean: Clean Docker resources (volumes, orphans)
• make docker-logs: View container logs

CI/CD Support:

• make ci: Complete CI pipeline (format + check + test + coverage)
• make all: Full build pipeline
• make pre-commit: Pre-commit validation

User Experience:

• Enhanced help with Quick Start section
• Organized commands by category
• Consistent color coding for better readability
• Helpful hints and next-step suggestions
• Environment status in info command

🤖 Generated with Claude Code