Implements a bunch more moves

PkmnLib.Static/Utils/Random.cs

@@ -46,6 +46,8 @@ public interface IRandom
     /// Get a random boolean. 50% chance of being true.
     /// </summary>
     public bool GetBool();
+
+    public T OneOf<T>(IReadOnlyList<T> list);
 }
 
 /// <inheritdoc />
@@ -94,4 +96,12 @@ public class RandomImpl : IRandom
 
     /// <inheritdoc />
     public bool GetBool() => _random.Next(2) == 1;
+
+    /// <inheritdoc />
+    public T OneOf<T>(IReadOnlyList<T> list)
+    {
+        if (list.Count == 0)
+            throw new ArgumentException("List cannot be empty.", nameof(list));
+        return list[GetInt(list.Count)];
+    }
 }