feat: Add multiple data sources (#19)

create-app.ts

helpers/env-variables.ts

helpers/index.ts

helpers/python.ts

helpers/types.ts

helpers/typescript.ts

index.ts

package.json

pnpm-lock.yaml

questions.ts

templates/components/loaders/python/__init__.py

templates/components/loaders/python/file.py

templates/components/loaders/python/file/loader.py

templates/components/loaders/python/web.py

templates/components/loaders/python/web/loader.py

templates/components/vectordbs/python/milvus/generate.py

templates/components/vectordbs/python/mongo/generate.py

templates/components/vectordbs/python/none/generate.py

templates/components/vectordbs/python/pg/generate.py

templates/components/vectordbs/python/pinecone/generate.py