refactor!: Use Func<Task> for scheduled tasks

Internal/Internal.cs

@@ -1,4 +1,6 @@
-namespace Xorog.UniversalExtensions;
+using Xorog.UniversalExtensions.Entities;
+
+namespace Xorog.UniversalExtensions;
 
 internal static class Internal
 {
@@ -79,43 +81,9 @@ internal static class Internal
     }
 }
 
-public class InternalSheduler
+internal class InternalScheduler
 {
     public static Dictionary<string, ScheduledTask> RegisteredScheduledTasks { get; internal set; } = new Dictionary<string, ScheduledTask>();
-
-    public class ScheduledTask
-    {
-        public ScheduledTask()
-        {
-            this.Uid = Guid.NewGuid().ToString();
-        }
-
-        /// <summary>
-        /// The unique identifier of this task.
-        /// </summary>
-        public string Uid { get; internal set; }
-
-        /// <summary>
-        /// The custom data asscociated with this task.
-        /// </summary>
-        public object? CustomData { get; internal set; }
-
-        /// <summary>
-        /// The time this task will run.
-        /// </summary>
-        public DateTime? RunTime { get; internal set; }
-
-        /// <summary>
-        /// The <see cref="CancellationTokenSource"/> to prematurely dequeue this task.
-        /// </summary>
-        internal CancellationTokenSource? TokenSource { get; set; } = new();
-
-        /// <summary>
-        /// Delete this task.
-        /// </summary>
-        public void Delete() =>
-            ScheduledTaskExtensions.DeleteScheduledTask(Uid);
-    }
 }
 
 public class HumanReadableTimeFormatConfig