Add the Cabinet Applet (#340)

This adds the missing Cabinet Applet, which allows for formatting
Amiibos and changing their names.

src/Ryujinx.HLE/UI/IHostUIHandler.cs

@@ -24,6 +24,18 @@ namespace Ryujinx.HLE.UI
         /// <returns>True when OK is pressed, False otherwise.</returns>
         bool DisplayMessageDialog(ControllerAppletUIArgs args);
 
+        /// <summary>
+        /// Displays an Input Dialog box to the user so they can enter the Amiibo's new name
+        /// </summary>
+        /// <param name="userText">Text that the user entered. Set to `null` on internal errors</param>
+        /// <returns>True when OK is pressed, False otherwise. Also returns True on internal errors</returns>
+        bool DisplayCabinetDialog(out string userText);
+
+        /// <summary>
+        /// Displays a Message Dialog box to the user to notify them to scan the Amiibo.
+        /// </summary>
+        void DisplayCabinetMessageDialog();
+
         /// <summary>
         /// Tell the UI that we need to transition to another program.
         /// </summary>