Implements a bunch more moves

Plugins/PkmnLib.Plugin.Gen7/Scripts/Moves/Swallow.cs

@@ -0,0 +1,29 @@
+using PkmnLib.Plugin.Gen7.Scripts.Pokemon;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+[Script(ScriptCategory.Move, "swallow")]
+public class Swallow : Script
+{
+    /// <inheritdoc />
+    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    {
+        var stockpileEffect = move.User.Volatile.Get<StockpileEffect>();
+        if (stockpileEffect == null || stockpileEffect.StockpileCount == 0)
+        {
+            move.GetHitData(target, hit).Fail();
+            return;
+        }
+        var stockpileCount = stockpileEffect.StockpileCount;
+
+        var modifier = stockpileCount switch
+        {
+            1 => 0.25f,
+            2 => 0.5f,
+            _ => 1f,
+        };
+        var heal = move.User.MaxHealth * modifier;
+        move.User.Heal((uint)heal);
+        move.User.Volatile.Remove<StockpileEffect>();
+    }
+}