Added scheduler and added more graceful error handling

Scheduler/AppSettings.txt

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+C:\Users\Shaamil\Desktop\BadmintonBooker\Scheduler

Scheduler/Program.cs

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+using System.Reflection;
+using System.Text;
+using Microsoft.Win32.TaskScheduler;
+
+if(args.Length != 1)
+{
+    Console.WriteLine("Usage: Scheduler <timeslot>");
+    return;
+}
+
+var timeslot = args[0];
+if (!TimeSpan.TryParse(timeslot, out var _))
+{
+    Console.WriteLine("Invalid timeslot format. Use HH:mm");
+    return;
+}
+
+var dir = new DirectoryInfo(File.ReadAllText("AppSettings.txt"))!;
+var builder = new StringBuilder();
+builder.AppendLine($"cd {dir.Parent!.FullName}");
+builder.AppendLine($"dotnet run -- {timeslot}");
+File.WriteAllText("run.bat", builder.ToString());
+
+using (TaskService taskService = new TaskService())
+{
+    try
+    {
+        var existingTask = taskService.GetTask("BadmintonBooker");
+        if (existingTask != null)
+        {
+            taskService.RootFolder.DeleteTask("BadmintonBooker", false);
+        }
+    }
+    catch (Exception ex)
+    {
+        Console.WriteLine($"Error deleting existing task: {ex.Message}");
+    }
+
+    TaskDefinition taskDef = taskService.NewTask();
+    taskDef.RegistrationInfo.Description = "Scheduled Task with Credentials";
+    taskDef.Principal.RunLevel = TaskRunLevel.Highest;
+
+    taskDef.Triggers.Add(new TimeTrigger
+    {
+        StartBoundary = DateTime.Today.AddDays(1) + TimeSpan.Parse("07:40")
+    });
+    
+    taskDef.Actions.Add(new ExecAction("cmd", $"/c \"{Path.Combine(dir.FullName, "run.bat")}\" > C:\\Output.log 2>&1"));
+
+    var pass = File.ReadAllText("Password.txt");
+    taskService.RootFolder.RegisterTaskDefinition(
+        "BadmintonBooker",
+        taskDef,
+        TaskCreation.CreateOrUpdate,
+        "Shaamil",
+        pass,
+        TaskLogonType.Password
+    );
+}

Scheduler/Scheduler.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Include="AppSettings.txt" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="TaskScheduler" Version="2.12.0" />
+  </ItemGroup>
+</Project>