Feature: Knowledge Base RAG Workflow Example

[Ayush7614]

Description

Add a production-ready example demonstrating how to build a Retrieval-Augmented Generation (RAG) pipeline using xpander SDK Knowledge Bases.

What it should cover

• Create a Knowledge Base
• Upload documents (PDF/TXT/URLs)
• Search KB using asearch()
• Inject results into agent prompt
• Generate grounded response

Why this matters

Shows real-world enterprise usage of:

• KnowledgeBases
• asearch()
• Agent + external knowledge integration

Acceptance Criteria

• Example runs end-to-end
• Uses xpander SDK APIs only
• Clear setup steps
• No mock logic

[Ayush7614]

@xpander-moriel