feat(hs): periodic scheduled start plugin + config + state

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/GameLogic/PlugIns/PeriodicTasks/HeykelSavasiStartConfiguration.cs

@@ -0,0 +1,28 @@
+// <copyright file="HeykelSavasiStartConfiguration.cs" company="MUnique">
+// Licensed under the MIT License. See LICENSE file in the project root for full license information.
+// </copyright>
+
+namespace MUnique.OpenMU.GameLogic.PlugIns.PeriodicTasks;
+
+/// <summary>
+/// The heykel savasi start configuration.
+/// </summary>
+public class HeykelSavasiStartConfiguration : MiniGameStartConfiguration
+{
+    /// <summary>
+    /// Gets the default configuration for heykel savasi.
+    /// </summary>
+    public static HeykelSavasiStartConfiguration Default =>
+        new()
+        {
+            PreStartMessageDelay = TimeSpan.Zero,
+            EntranceOpenedMessage = "Heykel Savasi entrance is open and closes in {0} minute(s).",
+            EntranceClosedMessage = "Heykel Savasi entrance closed.",
+            TaskDuration = TimeSpan.FromMinutes(20),
+            Timetable = new List<TimeOnly>
+            {
+                new(20, 0),
+                new(22, 0),
+            },
+        };
+}