Add deployment strategy configuration and GitHub Actions CI/CD workflows

[jalexw]

Summary

This PR adds support for configurable deployment strategies and scaffolds GitHub Actions CI/CD workflows during project initialization. Users can now choose between Vercel and no deployment strategy, with corresponding workflow files and configuration generated automatically.

Key Changes

• Deployment Strategy Configuration: Added --deployment CLI option supporting "vercel" or "none" strategies with interactive prompts for user input
• GitHub Actions Workflows:
  • Created ci.yml workflow that runs build, typecheck, and conditionally deploys to Vercel on main branch pushes
  • Created migrate-production.yml reusable workflow for running database migrations with production secrets
• Vercel Integration:
  • Added vercel.json configuration file generation when Vercel deployment is selected
  • Configured with Next.js framework, bun package manager, and proper build/output settings
• Scaffold Updates: Extended scaffold() function to generate .github/workflows/ directory and deployment-specific files
• Test Coverage: Updated test script to validate new workflow files and deployment configuration

Implementation Details

• Deployment strategy is validated using Zod schema (z.enum(["vercel", "none"]))
• CI workflow conditionally includes publish-to-vercel job only when deployment strategy is "vercel"
• Workflows use Bun package manager and Node.js 24
• Production migrations workflow accepts secrets via workflow_call for reusability
• Vercel deployment job runs only on pushes to main branch and depends on successful build job

https://claude.ai/code/session_013iTwmsSWk3jF7u5XZWEQkV