Restructure solution layout by module

src/Cli/StellaOps.Cli/Services/PolicyApiException.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Net;
+
+namespace StellaOps.Cli.Services;
+
+internal sealed class PolicyApiException : Exception
+{
+    public PolicyApiException(string message, HttpStatusCode statusCode, string? errorCode, Exception? innerException = null)
+        : base(message, innerException)
+    {
+        StatusCode = statusCode;
+        ErrorCode = errorCode;
+    }
+
+    public HttpStatusCode StatusCode { get; }
+
+    public string? ErrorCode { get; }
+}