First couple abilities implemented

Plugins/PkmnLib.Plugin.Gen7/Scripts/Side/BatteryAbilityEffect.cs

@@ -0,0 +1,27 @@
+using PkmnLib.Static.Moves;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Side;
+
+[Script(ScriptCategory.Side, "battery")]
+public class BatteryAbilityEffect : Script
+{
+    private HashSet<IPokemon> _placers = new();
+
+    public void PlacerActivated(IPokemon placer) => _placers.Add(placer);
+
+    public void PlacerDeactivated(IPokemon placer)
+    {
+        _placers.Remove(placer);
+        if (_placers.Count == 0)
+            RemoveSelf();
+    }
+
+    /// <inheritdoc />
+    public override void ChangeDamageModifier(IExecutingMove move, IPokemon target, byte hit, ref float modifier)
+    {
+        if (move.UseMove.Category == MoveCategory.Special)
+        {
+            modifier *= 5325f / 4096f; // ~1.3x
+        }
+    }
+}