Use PCGRandom instead of System.Random, documentation

PkmnLib.Dynamic/GlobalUsings.cs

@@ -1,6 +1,14 @@
 global using LevelInt = byte;
 
+namespace PkmnLib.Dynamic;
+
+/// <summary>
+/// Constants used in the dynamic library.
+/// </summary>
 public class Const
 {
+    /// <summary>
+    /// The max number of moves a Pokemon can have.
+    /// </summary>
     public const int MovesCount = 4;
 }