Document all undocumented methods and properties

PkmnLib.Dynamic/Libraries/DataLoaders/ItemDataLoader.cs

@@ -9,8 +9,14 @@ using PkmnLib.Static.Utils;
 
 namespace PkmnLib.Dynamic.Libraries.DataLoaders;
 
+/// <summary>
+/// Loads item data from a JSON file.
+/// </summary>
 public static class ItemDataLoader
 {
+    /// <summary>
+    /// Loads the item library from a JSON file.
+    /// </summary>
     public static ItemLibrary LoadItems(Stream stream, Action<List<SerializedItem>>? onAfterLoad = null)
     {
         var library = new ItemLibrary();
@@ -24,10 +30,16 @@ public static class ItemDataLoader
         return library;
     }
 
+    /// <summary>
+    /// Factory delegate for creating items.
+    /// </summary>
     public delegate IItem ItemFactoryDelegate(SerializedItem serialized, StringKey name, ItemCategory type,
         BattleItemCategory battleType, int price, ImmutableHashSet<StringKey> flags, ISecondaryEffect? effect,
         ISecondaryEffect? battleTriggerEffect, Dictionary<StringKey, object?> additionalData);
 
+    /// <summary>
+    /// The item constructor. This is used to create items from the JSON data.
+    /// </summary>
     [PublicAPI]
     public static ItemFactoryDelegate ItemConstructor { get; set; } =
         (_, name, type, battleType, price, flags, effect, battleTriggerEffect, additionalData) => new ItemImpl(name,