Move all battle state from IPokemon to an ephemeral IBattlePokemon wrapper

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/Hydration.cs

@@ -8,12 +8,12 @@ namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
 [Script(ScriptCategory.Ability, "hydration")]
 public class Hydration : Script, IScriptOnEndTurn
 {
-    private IPokemon? _pokemon;
+    private IBattlePokemon? _pokemon;
 
     /// <inheritdoc />
     public override void OnAddedToParent(IScriptSource source)
     {
-        if (source is not IPokemon pokemon)
+        if (source is not IBattlePokemon pokemon)
             throw new InvalidOperationException("Hydration can only be added to a Pokemon script source.");
         _pokemon = pokemon;
     }