feat: Add fly.io deployment (#443)

.changeset/olive-comics-grab.md

helpers/python.ts

helpers/typescript.ts

templates/components/agents/python/blog/README-template.md

...ponents/agents/python/financial_report/README-template.md

.../components/agents/python/form_filling/README-template.md

templates/types/streaming/express/Dockerfile

templates/types/streaming/fastapi/DEPLOY.md

templates/types/streaming/fastapi/Dockerfile

templates/types/streaming/fastapi/README-template.md

templates/types/streaming/nextjs/Dockerfile