Added getWeatherType for future compatibility checks

src/field/arena.ts

@@ -331,6 +331,10 @@ export class Arena {
     return this.terrain?.terrainType || TerrainType.NONE;
   }
 
+  getWeatherType() : WeatherType {
+    return this.weather?.weatherType || WeatherType.NONE;
+  }
+
   getAttackTypeMultiplier(attackType: Type, grounded: boolean): number {
     let weatherMultiplier = 1;
     if (this.weather && !this.weather.isEffectSuppressed(this.scene))