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/models/index.js

@@ -117,6 +117,9 @@ import VehicleType from './falukant/type/vehicle.js';
 import Vehicle from './falukant/data/vehicle.js';
 import Transport from './falukant/data/transport.js';
 import RegionDistance from './falukant/data/region_distance.js';
+import WeatherType from './falukant/type/weather.js';
+import Weather from './falukant/data/weather.js';
+import ProductWeatherEffect from './falukant/type/product_weather_effect.js';
 
 import Room from './chat/room.js';
 import ChatUser from './chat/user.js';
@@ -228,6 +231,9 @@ const models = {
   ElectionHistory,
   UndergroundType,
   Underground,
+  WeatherType,
+  Weather,
+  ProductWeatherEffect,
   Room,
   ChatUser,
   ChatRight,