Output an error when an unsupported CPU architecture is detected

Il2CppInspector/Il2CppBinary.cs

@@ -50,7 +50,7 @@ namespace Il2CppInspector
             // Get type from image architecture
             var type = Assembly.GetExecutingAssembly().GetType("Il2CppInspector.Il2CppBinary" + stream.Arch.ToUpper());
             if (type == null)
-                return null;
+                throw new InvalidOperationException("Unsupported architecture: " + stream.Arch);
 
             var inst = (Il2CppBinary) Activator.CreateInstance(type, stream);
 

Il2CppInspector/Il2CppInspector.cs

@@ -174,6 +174,7 @@ namespace Il2CppInspector
                 Console.WriteLine("Instruction set: " + image.Arch);
 
                 // Architecture-agnostic load attempt
+                try {
                     if (Il2CppBinary.Load(image, metadata.Version) is Il2CppBinary binary) {
                         processors.Add(new Il2CppInspector(binary, metadata));
                     }
@@ -181,6 +182,10 @@ namespace Il2CppInspector
                         Console.Error.WriteLine("Could not process IL2CPP image");
                     }
                 }
+                catch (InvalidOperationException ex) {
+                    Console.Error.WriteLine(ex.Message);
+                }
+            }
             return processors;
         }
     }