Improve code quality and maintainability across C# projects

Major improvements implemented:
- Fixed async/await patterns: Replaced .Wait() calls and Thread.Sleep with proper async equivalents
- Enhanced error handling: Added null checks, exception handling, and meaningful error messages
- Improved code consistency: Fixed variable naming (pullRequenstTracker -> pullRequestTracker)
- Better documentation: Streamlined XML documentation with clearer, more concise descriptions
- Removed dead code: Cleaned up commented-out Options class
- Enhanced safety: Added ArgumentNullException guards in constructors
- Improved user experience: Added input validation and better error reporting in FileManager
- Fixed duplicate handlers: Removed duplicate HelpTrigger in FileManager handlers list

Technical changes:
- Platform.Bot/Program.cs: Replaced Thread.Sleep with Task.Delay, fixed variable typo
- HelloWorldTrigger.cs: Changed .Wait() to await, added null checks
- MergeDependabotBumpsTrigger.cs: Replaced .AwaitResult() with await, improved error handling
- IssueTracker.cs: Added comprehensive error handling and better cancellation support
- FileManager/Program.cs: Enhanced input validation and error handling, made handlers readonly
- Interfaces: Improved XML documentation for better API understanding

All projects build successfully with these improvements.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: konard

csharp/FileManager/Program.cs

@@ -22,33 +22,45 @@ internal class Program
         /// </para>
         /// <para></para>
         /// </summary>
-        public static List<ITrigger<Context>> Handlers = new()
+        public static readonly List<ITrigger<Context>> Handlers = new()
         {
             new CreateTrigger(),
             new DeleteTrigger(),
             new HelpTrigger(),
             new LinksPrinterTrigger(),
             new ShowTrigger(),
-            new HelpTrigger(),
             new CreateFileSetTrigger(),
             new GetFilesByFileSetNameTrigger()
         };
         private static async Task Main(string[] args)
         {
             using ConsoleCancellation cancellation = new();
             var dbContext = new FileStorage(ConsoleHelpers.GetOrReadArgument(0, "Database file name", args));
-            new HelpTrigger().Action(new Context { FileStorage = dbContext, Args = args });
+            await new HelpTrigger().Action(new Context { FileStorage = dbContext, Args = args });
             try
             {
                 while (!cancellation.Token.IsCancellationRequested)
                 {
                     var input = Console.ReadLine();
-                    var Context = new Context { FileStorage = dbContext, Args = input.Split() };
+                    if (string.IsNullOrWhiteSpace(input))
+                    {
+                        continue;
+                    }
+                    
+                    var context = new Context { FileStorage = dbContext, Args = input.Split() };
                     foreach (var handler in Handlers)
                     {
-                        if (await handler.Condition(Context))
+                        try
+                        {
+                            if (await handler.Condition(context))
+                            {
+                                await handler.Action(context);
+                                break;
+                            }
+                        }
+                        catch (Exception ex)
                         {
-                            handler.Action(Context);
+                            Console.WriteLine($"Error processing handler {handler.GetType().Name}: {ex.Message}");
                         }
                     }
                 }