Add RSS feed tool for fetching and processing articles

Implement LangGraph Agent for Research with Document Retrieval and Search Tools

Update README.md to enhance feature descriptions and clarify tool usage; include DuckDuckGo in web search options and improve research process transparency.

Enhance research agent functionality by adding document retrieval and search capabilities; update agent chain to include context from uploaded documents and improve state management.

Refactor chainlit_handlers.py to enhance error handling, improve type annotations, and add detailed docstrings for better code clarity and maintainability

Add DuckDuckGo search tool to research toolkit and update dependencies

Refactor research tools and agent chain; update imports and enhance functionality with new tools

Refactor prompt retrieval to use configurable source from config; enhance code clarity

Update README to enhance research tools section and clarify document analysis capabilities

Enhance README and configuration for improved research capabilities; add research tools for web and document analysis

Refactor code structure for improved readability and maintainability