Adds a bunch more move scripts

PkmnLib.Dynamic/Models/Pokemon.cs

@@ -93,7 +93,14 @@ public interface IPokemon : IScriptSource
     float WeightInKg { get; set; }
 
     /// <summary>
-    /// The height of the Pokemon in meters.
+    /// Sets the weight of the Pokémon in kilograms. Returns whether the weight was changed.
+    /// </summary>
+    /// <param name="weightInKg">The new weight in kilograms</param>
+    /// <returns></returns>
+    public bool ChangeWeightInKgBy(float weightInKg);
+    
+    /// <summary>
+    /// The height of the Pokémon in meters.
     /// </summary>
     float HeightInMeters { get; set; }
 
@@ -543,6 +550,18 @@ public class PokemonImpl : ScriptSource, IPokemon
     /// <inheritdoc />
     public float WeightInKg { get; set; }
 
+    /// <inheritdoc />
+    public bool ChangeWeightInKgBy(float weightInKg)
+    {
+        if (WeightInKg <= 0.1f)
+            return false;
+        var newWeight = WeightInKg + weightInKg;
+        if (newWeight <= 0.1f)
+            newWeight = 0.1f;
+        WeightInKg = newWeight;
+        return true;
+    }
+
     /// <inheritdoc />
     public float HeightInMeters { get; set; }