[Feature Request] - Provide any LangChain supported data loader in retriever config

[pranav-kural]

Checklist

• I have searched the existing issues and this feature has not been requested before.
• I have checked the QvikChat Feature Release project and this feature is not listed there.
• [] Optional: I have read the QvikChat documentation and there is no alternative to this feature.
• [] Optional: I am willing to implement this feature and submit a pull request.

Description

Implement the logic so that any LangChain-supported data loader can be provided as part of the retriever config when defining a chat endpoint.

Proposal

Updated to defineChatEndpoint and getDataRetriever.

Alternatives

List any alternative solutions or features you've considered.

Select Components this Feature will Impact

Select component(s) this feature will impact

• [] API Key Authentication
• [] Chat Agents
• Chat Endpoints
• [] Chat History
• [] Embedding Models
• [] Endpoint Deployment
• [] LLM Models
• RAG
• [] Response Caching
• [] Vector Stores
• [] Other