docs & feat: update README with AI agent, risk analyst, Alpaca integration and UI enhancements

feat: Integrate Alpaca Live Trading, visual feed panel, and same-day replay mode

feat: Implement Historical Replay Simulator, Intraday Trade Inspector, and typography bugfixes

chore: rename branding from Quont to Quant and fix frontend build compilation errors

docs: add resume project description templates

Implement indicators, Regime Router, Risk Sizing, and Walk-Forward Engine