Simplify FastAPI fullstack template by using one deployment (#423)

.changeset/popular-dryers-check.md

create-app.ts

e2e/python/resolve_dependencies.spec.ts

e2e/shared/extractor_template.spec.ts

e2e/shared/multiagent_template.spec.ts

e2e/shared/streaming_template.spec.ts

e2e/typescript/resolve_dependencies.spec.ts

e2e/utils.ts

helpers/devcontainer.ts

helpers/env-variables.ts

helpers/run-app.ts

helpers/types.ts

helpers/typescript.ts

index.ts

questions/questions.ts

questions/types.ts

templates/.gitignore

templates/README-fullstack.md

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

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