feat: initialize project structure with core components and pages

- Added shared styles for UI components in `src/components/styles.ts`.
- Created configuration constants in `src/lib/config.ts`.
- Implemented date formatting and greeting functions in `src/lib/dates.ts` and corresponding tests in `src/lib/dates.test.ts`.
- Developed incident management functions in `src/lib/incidents.ts` with tests in `src/lib/incidents.test.ts`.
- Established navigation structure in `src/lib/navigation.ts`.
- Seeded demo data for incidents and users in `src/lib/seed.ts`.
- Defined tone classes for UI elements in `src/lib/tones.ts`.
- Created type definitions for incidents and related entities in `src/lib/types.ts`.
- Set up main application entry point in `src/main.tsx`.
- Developed various pages including About, Analytics, Incidents, Locations, Overview, and Report Incident.
- Configured testing setup in `src/test/setup.ts` and TypeScript configurations.
- Integrated Vite for development and testing with appropriate plugins.

src/lib/navigation.ts

@@ -0,0 +1,23 @@
+import { BarChart3, ClipboardList, LayoutDashboard, MapPin, type LucideIcon } from 'lucide-react'
+
+export interface NavItem {
+  label: string
+  to: string
+  icon: LucideIcon
+}
+
+export const primaryNav: NavItem[] = [
+  { label: 'Overview', to: '/', icon: LayoutDashboard },
+  { label: 'Incidents', to: '/incidents', icon: ClipboardList },
+  { label: 'Locations', to: '/locations', icon: MapPin },
+  { label: 'Analytics', to: '/analytics', icon: BarChart3 },
+]
+
+export const pageTitles: Record<string, string> = {
+  '/': 'Overview',
+  '/incidents': 'Incidents',
+  '/locations': 'Locations',
+  '/analytics': 'Analytics',
+  '/report': 'Report an incident',
+  '/about': 'About',
+}