Adds doxygen comments to SBF namespace.

Adds doxygen header to header files.

sbf-cpp/Virtues.h

@@ -1,8 +1,19 @@
 #ifndef VIRTUES_H__
 #define VIRTUES_H__
+/***************************************************************************************
+* @file Virtues.h
+*
+* @brief Defines constants and functions for working with virtues.
+* @copyright
+* Copyright 2023 Tom Hicks
+* Licensed under the MIT license see the LICENSE file for details.
+***************************************************************************************/
 #include <string>
 #include <vector>
 
+/** \addtogroup Virtues
+ * @{
+*/
 namespace SBF {
     const int kVirtuePoints = 7;
     const int kVirtueSelfControlId = 1;
@@ -21,4 +32,5 @@ namespace SBF {
     const std::string GetVirtueLabel(int virtueId);
     void FillVirtueLabels(std::vector<std::string> virtueLabels);
 } // End namespace SBF
+/** @}*/
 #endif // End !defined VIRTUES_H__