BETA:RC-27:04:2026 - V4 Major release

[CODE-Y02]

Description

This PR represents a total "2026-Ready" modernization of the create-express-forge CLI and its monorepo infrastructure. We have moved away from legacy tooling (ESLint/Prettier) in favor of a high-performance unified stack, while simultaneously hardening the core scaffolding logic and templates.

Key Changes:

• Biome Integration: Migrated the entire monorepo and all generated templates to Biome 2.4. This delivers sub-100ms linting/formatting and simplifies the dependency tree.
• Generator Architecture: Re-architected the monolithic generator into modular components (Base, Structure, Features), making the codebase significantly easier to maintain and extend.
• Framework Upgrades: Updated core templates to Express 5 (utilizing native async error handling) and Prisma 6.
• Professional Testing:
  • Separated internal codebase logic tests (main.test.ts) from CLI integration tests (smoke.integration.test.ts).
  • Logic tests now skip the "polishing" step to run in ~2 seconds.
  • Disabled Turborepo test caching to ensure 100% reliable smoke validation.
• Production Hardening: Implemented graceful shutdown handlers (SIGTERM/SIGINT) and fail-fast database connection checks on server startup.
• Docker Pro Pattern: Implemented a best-practice multi-stage Dockerfile that prunes devDependencies while preserving the generated Prisma client.

Type of change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Refactor / chore

Checklist

• I have run pnpm run check-types with no errors
• I have run pnpm run test and all tests pass
• I have run pnpm run build successfully
• I have added a changeset (pnpm changeset) if this affects a published package
• I have updated relevant documentation