feat: add StopsMap and WalkingDirections components for enhanced map functionality

- Implemented StopsMap component to display bus stops on a map using MapLibre GL.
- Integrated walking directions feature in WalkingDirections component to calculate routes from user location to selected bus stop.
- Added geo utility functions for coordinate validation and distance calculation.
- Created route grouping and stop filtering logic in routeGroups module.
- Developed custom hooks for managing stop routes with React Query.
- Added tests for routing and stop functionalities to ensure reliability.

package.json

@@ -22,6 +22,7 @@
     "@vkontakte/icons": "^3.75.0",
     "dexie": "^4.4.6",
     "dexie-react-hooks": "^4.4.0",
+    "maplibre-gl": "^6.13.0",
     "react": "^19.3.0",
     "react-dom": "^19.3.0",
     "react-router-dom": "^7.18.4"