Add product weather effects and regional pricing enhancements

- Introduced a new endpoint in FalukantController to retrieve product prices based on region and product ID.
- Implemented logic in FalukantService to calculate product prices considering user knowledge and regional factors.
- Added weather-related data models and associations to enhance product pricing accuracy based on weather conditions.
- Updated frontend components to cache and display regional product prices effectively, improving user experience.

backend/routers/falukantRouter.js

@@ -70,6 +70,7 @@ router.post('/politics/elections', falukantController.vote);
 router.get('/politics/open', falukantController.getOpenPolitics);
 router.post('/politics/open', falukantController.applyForElections);
 router.get('/cities', falukantController.getRegions);
+router.get('/products/price-in-region', falukantController.getProductPriceInRegion);
 router.get('/products/prices-in-cities', falukantController.getProductPricesInCities);
 router.get('/vehicles/types', falukantController.getVehicleTypes);
 router.post('/vehicles', falukantController.buyVehicles);