feat(dobj): added error tracking to DObject

DObject now includes an error code so that errors can be tracked with return values from functions

src/dobj/private/DObject.cpp

@@ -48,6 +48,19 @@ bool DObject::isDebuggingEnabled() const noexcept {
     return debugEnabled_;
 }
 
+/**
+* @breif Sets an error code and returns the old one
+*/
+int DObject::setErrorCode(int code) noexcept {
+    int oldCode = errorCode_;
+    errorCode_ = code;
+    return oldCode;
+}
+
+int DObject::getErrorCode() const noexcept {
+    return errorCode_;
+}
+
 /**
  * @brief Registers a plugin with the DObject.
  */
@@ -203,4 +216,4 @@ std::ostream& operator<<(std::ostream& os, const DObject& obj) {
     os << "\n  Data Type: " << obj.dataTypeMap.at(obj.data_.index());
     os << "\n  Plugins Registered: " << obj.plugins_.size() << "\n";
     return os;
-}
+}