Document all undocumented methods and properties

PkmnLib.Dynamic/Libraries/DataLoaders/NatureDataLoader.cs

@@ -3,10 +3,16 @@ using PkmnLib.Static.Libraries;
 
 namespace PkmnLib.Dynamic.Libraries.DataLoaders;
 
+/// <summary>
+/// Loads nature data from a CSV file.
+/// </summary>
 public static class NatureDataLoader
 {
     private static readonly char[] CommonCsvDelimiters = ['|', ','];
 
+    /// <summary>
+    /// Loads the nature library from a CSV file.
+    /// </summary>
     public static NatureLibrary LoadNatureLibrary(Stream stream)
     {
         var library = new NatureLibrary();