feat: integrate Umami analytics for user interactions across various components. Track sign-in, sign-up, and test attempt events, enhancing user engagement insights. Update README.md to include new db:seed command and document sticky header patterns for detail pages.

feat: add support section to README, implement donation modal, and enhance routing with new dashboard and not found pages. Update sitemap for improved SEO and adjust navigation links to point to the dashboard. Introduce new package card component for better package management and enhance error handling in various components.

feat: update accessibility guidelines and enhance component structure. Introduce new frontend accessibility conventions in AGENTS.md, including heading hierarchy and ARIA roles for dialogs and buttons. Refactor TourGuide and related components for lazy loading and improved user experience. Update ESLint configuration to enforce stricter TypeScript rules and add new dependencies for linting. Enhance various components with accessibility features and ensure consistent styling across the application.

Add analytics components including BreakdownCharts, OverviewCards, ScoreTrendChart, TimeAnalyticsPanel, and WeaknessPanel. Update routing to include analytics routes and enhance sidebar navigation. Add recharts dependency for data visualization.