Adds a lot more move effects

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

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+using PkmnLib.Dynamic.Models.BattleFlow;
+using PkmnLib.Static.Utils;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
+
+[Script(ScriptCategory.Move, "recoil")]
+public class Recoil : Script
+{
+    private float _recoilPercentage;
+    
+    /// <inheritdoc />
+    public override void OnInitialize(IReadOnlyDictionary<StringKey, object?>? parameters)
+    {
+        if (parameters == null)
+            return;
+        if (parameters.TryGetValue("recoil_percentage", out var recoilPercentage))
+            _recoilPercentage = recoilPercentage as float? ?? 0f;
+    }
+
+    /// <inheritdoc />
+    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    {
+        if (_recoilPercentage <= 0)
+            return;
+        var hitData = move.GetHitData(target, hit);
+        var recoilDamage = (uint)(hitData.Damage * _recoilPercentage);
+        move.User.Damage(recoilDamage, DamageSource.Misc);
+    }
+}