Add IContextMenu service (#1682)

Dalamud/Plugin/Services/IContextMenu.cs

@@ -0,0 +1,37 @@
+using Dalamud.Game.Gui.ContextMenu;
+using Dalamud.Game.Text;
+using Dalamud.Game.Text.SeStringHandling;
+
+namespace Dalamud.Plugin.Services;
+
+/// <summary>
+/// This class provides methods for interacting with the game's context menu.
+/// </summary>
+public interface IContextMenu
+{
+    /// <summary>
+    /// A delegate type used for the <see cref="OnMenuOpened"/> event.
+    /// </summary>
+    /// <param name="args">Information about the currently opening menu.</param>
+    public delegate void OnMenuOpenedDelegate(MenuOpenedArgs args);
+
+    /// <summary>
+    /// Event that gets fired every time the game framework updates.
+    /// </summary>
+    event OnMenuOpenedDelegate OnMenuOpened;
+
+    /// <summary>
+    /// Adds a menu item to a context menu.
+    /// </summary>
+    /// <param name="menuType">The type of context menu to add the item to.</param>
+    /// <param name="item">The item to add.</param>
+    void AddMenuItem(ContextMenuType menuType, MenuItem item);
+
+    /// <summary>
+    /// Removes a menu item from a context menu.
+    /// </summary>
+    /// <param name="menuType">The type of context menu to remove the item from.</param>
+    /// <param name="item">The item to add.</param>
+    /// <returns><see langword="true"/> if the item was removed, <see langword="false"/> if it was not found.</returns>
+    bool RemoveMenuItem(ContextMenuType menuType, MenuItem item);
+}