Allow tools without datasource and clean up (#33)

.changeset/curvy-candles-mix.md

.changeset/eleven-lemons-look.md

.changeset/five-flowers-admire.md

.changeset/forty-ads-tell.md

.changeset/healthy-insects-check.md

helpers/copy.ts

helpers/datasources.ts

helpers/index.ts

helpers/python.ts

helpers/tools.ts

helpers/typescript.ts

questions.ts

templates/components/engines/python/agent/__init__.py

templates/components/engines/python/agent/tools.py

templates/components/engines/python/chat/__init__.py

templates/components/engines/typescript/agent/chat.ts

templates/components/engines/typescript/chat/chat.ts

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

templates/components/vectordbs/typescript/none/index.ts