Initial commit: AetherBags + KamiToolKit for FC Gitea

Co-authored-by: Cursor <cursoragent@cursor.com>

KamiToolKit/ContextMenu/ContextMenuSubItem.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using Lumina.Text.ReadOnly;
+
+namespace KamiToolKit.ContextMenu;
+
+/// <summary>
+/// One level of submenu only. Nested submenus not supported.
+/// </summary>
+public class ContextMenuSubItem : ContextMenuItem {
+    public List<ContextMenuItem> SubItems { get; set; } = [];
+
+    public void AddItem(ReadOnlySeString name, Action callback) {
+        SubItems.Add(new ContextMenuItem {
+            Name = name,
+            OnClick = callback,
+        });
+    }
+
+    public void AddItem(ContextMenuItem item) => SubItems.Add(item);
+}