First couple abilities implemented

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

@@ -0,0 +1,30 @@
+using PkmnLib.Static.Utils;
+
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+[Script(ScriptCategory.Ability, "prevent_stat_lowering")]
+public class PreventStatLowering : Script
+{
+    private Statistic _statistic;
+
+    /// <inheritdoc />
+    public override void OnInitialize(IReadOnlyDictionary<StringKey, object?>? parameters)
+    {
+        if (parameters is null)
+            throw new ArgumentNullException(nameof(parameters), "Parameters cannot be null.");
+        if (!parameters.TryGetValue("stat", out var statObj) || statObj is not string statStr)
+            throw new ArgumentException("Parameter 'stat' is required and must be a string.", nameof(parameters));
+        if (!Enum.TryParse(statStr, true, out Statistic stat))
+            throw new ArgumentException($"Invalid statistic '{statStr}' provided.", nameof(statStr));
+
+        _statistic = stat;
+    }
+
+    /// <inheritdoc />
+    public override void PreventStatBoostChange(IPokemon target, Statistic stat, sbyte amount, bool selfInflicted,
+        ref bool prevent)
+    {
+        if (!selfInflicted)
+            prevent = false;
+    }
+}