Add OpenRouter version documentation to README

Update live demo URL to OpenRouter version

Update invoice RAG to use OpenRouter API

Add branding and OpenAI agents module

Update README with Gemini versions of applications

change url

Add Multi-Agent Trip Planner with Gemini API

Add Invoice RAG Chat with Gemini API integration

Remove activity guide file and update README

Add Multi-Agent Trip Planner with Tavily Search integration

Add live demo link to README

Added Dev Container Folder

Add requirements.txt for Streamlit Cloud deployment

Fix st.secrets access for Streamlit Cloud compatibility

Update apps to use Streamlit secrets for cloud deployment