add debug info to static protoid in generic class error (#6395)

* add debug info to static protoid in generic class error

* lets see

* goida

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>

Robust.Shared/Prototypes/PrototypeManager.ValidateFields.cs

@@ -94,7 +94,14 @@ public partial class PrototypeManager
     private bool TryGetIds(FieldInfo field, [NotNullWhen(true)] out string[]? ids)
     {
         ids = null;
-        var value = field.GetValue(null);
+        if (field.DeclaringType?.IsGenericTypeDefinition == true)
+        {
+            // field's class has generic parameters, rethrow to say what the field is because
+            // c# is a great language and doesn't tell you anything in its exception in GetValue
+            throw new InvalidOperationException($"Field {field.FieldType} {field.Name} cannot be a static field inside a generic class");
+        }
+
+        object? value = field.GetValue(null);
         if (value == null)
             return false;