lightweight variant (#1)

Reviewed-on: #1
Co-authored-by: Aleksandr Neychev <alexnejchev73@gmail.com>

CursorLang.Core/Services/ILayoutPopupService.cs

@@ -0,0 +1,20 @@
+using CursorLang.Core.Models;
+
+namespace CursorLang.Core.Services;
+
+/// <summary>
+/// Shows the layout popup at the cursor.
+/// </summary>
+public interface ILayoutPopupService
+{
+    /// <summary>Shows the popup and takes it down after the time set in the settings.</summary>
+    void Show(KeyboardLayout layout);
+
+    /// <summary>
+    /// Shows the popup until <see cref="Hide"/> is called explicitly: needed where the
+    /// show time is set by a user action rather than by a timer.
+    /// </summary>
+    void ShowUntilHidden(KeyboardLayout layout);
+
+    void Hide();
+}