feat: add Citations and WatchlistChat components, integrate with API

- Implemented Citations component to display citation data.
- Created WatchlistDrawer and ChatSidebar components for managing watchlists and AI chat functionality.
- Integrated API calls for watchlist management and chat interactions.
- Updated index.tsx to include new components in the main application layout.
- Added API client in lib/api.ts for structured API interactions.
- Developed Alerts, Dashboard, Portfolio, Routines, Screener, and Report pages with relevant data fetching and UI components.
- Introduced styles in tokens.css for consistent theming across the application.
- Configured TypeScript and Vite for project setup and development.

backend/tests/fixtures/listing_bbca.json

@@ -0,0 +1,10 @@
+{
+ "symbol": "BBCA.JK",
+ "company_name": "Bank Central Asia",
+ "listing_date": "2000-05-31",
+ "chg_7d": 0.01,
+ "chg_30d": 0.03,
+ "chg_90d": 0.08,
+ "chg_365d": 0.25,
+ "offering_price": 1400
+}