More abilities, refactor custom triggers to be typed.

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

@@ -0,0 +1,31 @@
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+/// <summary>
+/// Magma Armor is an ability that prevents the Pokémon from being frozen.
+///
+/// <see href="https://bulbapedia.bulbagarden.net/wiki/Magma_Armor_(Ability)">Bulbapedia - Magma Armor</see>
+/// </summary>
+[Script(ScriptCategory.Ability, "magma_armor")]
+public class MagmaArmor : Script
+{
+    /// <inheritdoc />
+    public override void PreventStatusChange(IPokemon pokemon, StringKey status, bool selfInflicted,
+        ref bool preventStatus)
+    {
+        if (status == ScriptUtils.ResolveName<Status.Frozen>())
+        {
+            pokemon.BattleData?.Battle.EventHook.Invoke(new AbilityTriggerEvent(pokemon));
+            preventStatus = true;
+        }
+    }
+
+    /// <inheritdoc />
+    public override void OnSwitchIn(IPokemon pokemon, byte position)
+    {
+        if (pokemon.HasStatus(ScriptUtils.ResolveName<Status.Frozen>()))
+        {
+            pokemon.BattleData?.Battle.EventHook.Invoke(new AbilityTriggerEvent(pokemon));
+            pokemon.ClearStatus();
+        }
+    }
+}