Alternative Python-based orchestrator

While the current data explorer / front-end is implemented as a Java Spring app, we understand many GenAI teams like to work in Python.

The interfaces in [cdk/lib/orchestrators/base.ts](https://github.com/aws-samples/query-structured-data-with-amazon-bedrock/blob/main/cdk/lib/orchestrators/base.ts) have been deliberately standardised to support expanding this sample with alternative orchestrator/client layers in future. It'd be great to hear feedback (or even see PRs!) on what users would find most relevant for a Python option. For example: LangChain vs direct API? StreamLit vs other Python framework vs Python layer with JavaScript UI?

Start by reading cdk/lib/orchestrators/base.ts to understand the standardized interfaces and how the current Java Spring data explorer and front end use them. The issue asks for feedback on a Python orchestrator and client approach, but does not define a preferred framework, implementation scope, or acceptance criteria, so the desired outcome needs to be clarified first.

Written by the indexing model from the issue text.