feat: add flight tracking components and hooks

- Introduced FlightCard component for displaying flight information with animations.
- Added ScrollArea component for custom scroll behavior.
- Implemented StatusBar component to show flight count and loading status.
- Created useFlights hook for fetching and managing flight data based on city selection.
- Developed useSettings hook for managing user settings with local storage persistence.
- Added useTrailHistory hook for managing flight trail data.
- Defined City type and CITIES constant for city data management.
- Implemented flight utility functions for altitude and speed conversions.
- Created map styles for different visual representations.
- Added OpenSky API integration for fetching flight data.
- Implemented utility functions for class name merging.
- Configured TypeScript settings for the project.

postcss.config.mjs

@@ -0,0 +1,7 @@
+const config = {
+  plugins: {
+    "@tailwindcss/postcss": {},
+  },
+};
+
+export default config;