More work on refactor to interfaces

Plugins/PkmnLib.Plugin.Gen7/Scripts/Terrain/GrassyTerrain.cs

@@ -1,7 +1,7 @@
 namespace PkmnLib.Plugin.Gen7.Scripts.Terrain;
 
 [Script(ScriptCategory.Terrain, "grassy_terrain")]
-public class GrassyTerrain : Script, IScriptChangeBasePower
+public class GrassyTerrain : Script, IScriptChangeBasePower, IScriptOnEndTurn
 {
     private static bool IsAffectedByTerrain(IPokemon pokemon) =>
         !pokemon.IsFloating;
@@ -33,7 +33,7 @@ public class GrassyTerrain : Script, IScriptChangeBasePower
     }
 
     /// <inheritdoc />
-    public override void OnEndTurn(IScriptSource owner, IBattle battle)
+    public void OnEndTurn(IScriptSource owner, IBattle battle)
     {
         // At the end of each turn, Grassy Terrain restores 1/16 of the maximum HP of each affected Pokémon.
         foreach (var pokemon in battle.Sides.SelectMany(x => x.Pokemon).WhereNotNull())