feat: Implement Approve and Reject Withdrawal commands with handlers

src/CMSMicroservice.Application/Common/Exceptions/BadRequestException.cs

@@ -0,0 +1,19 @@
+namespace CMSMicroservice.Application.Common.Exceptions;
+
+public class BadRequestException : Exception
+{
+    public BadRequestException()
+        : base()
+    {
+    }
+
+    public BadRequestException(string message)
+        : base(message)
+    {
+    }
+
+    public BadRequestException(string message, Exception innerException)
+        : base(message, innerException)
+    {
+    }
+}