feat: Add legal document review use case (#467)

.changeset/stale-scissors-turn.md

e2e/shared/extractor_template.spec.ts

e2e/shared/reflex_template.spec.ts

e2e/utils.ts

helpers/datasources.ts

helpers/index.ts

helpers/python.ts

helpers/run-app.ts

helpers/types.ts

helpers/typescript.ts

index.ts

questions/datasources.ts

questions/questions.ts

questions/simple.ts

...ates/components/reflex/contract_review/README-template.md

templates/components/reflex/contract_review/app/config.py

templates/components/reflex/contract_review/app/models.py

.../reflex/contract_review/app/services/contract_reviewer.py

...ents/reflex/contract_review/app/ui/components/__init__.py

...flex/contract_review/app/ui/components/shared/__init__.py