Add Postgres Prisma scaffold support

[theinfosecguy]

Summary

• add Express TypeScript Postgres + Prisma scaffolding behind --db postgres --orm prisma
• make MongoDB selection explicit with --db mongodb and remove the legacy bare --db shortcut
• update interactive prompts, generated templates, OpenAPI output, examples, changelog, version metadata, and smoke coverage

Validation

• git diff --check origin/main..HEAD
• npm test (13 files, 345 tests)
• npm run test:package (1 smoke file, 6 tests)
• npm pack --dry-run
• scripted interactive wizard check for Express TypeScript Postgres/Prisma
• manual generated-app smoke: generated express --typescript --db postgres --orm prisma --openapi --port 5326 --skip-install, ran npm install --no-audit --no-fund, npm run db:generate, npm run build, npm test, booted node dist/index.js, and checked /health plus /

Notes

• Docker Compose route tests were not run locally because the Docker daemon was unavailable.