feat: prepare for Streamlit Cloud deployment - fix requirements.txt, add deployment config, error handling, and entry point

feat(ui): add robust multi-interface UI system (Streamlit, Dash, Jupyter, WebSocket) with launcher, docs, and integration tests [skip ci]

feat: Add comprehensive Alpaca integration with FinRL

Fix OpenCV import for RL tests, mark slow RL tests, and document in README

Add FinRL integration with comprehensive RL trading agent

Initial commit: Enhanced Algorithmic Trading System with Synthetic Data Generation, Comprehensive Logging, and Extensive Testing