say NO to try-catch in controllers

- added ExceptionsMiddleware.cs
- added more Exception types
- removed all exceptions logic in controllers

SurveyBackend/SurveyBackend.Services/Exceptions/NotFoundException.cs

@@ -0,0 +1,10 @@
+namespace SurveyBackend.Services.Exceptions;
+
+public class NotFoundException : ServiceException
+{
+    public override int StatusCode => 404;
+
+    public NotFoundException(string message) : base(message)
+    {
+    }
+}