Add: Configuration of NewGRF badges.

src/newgrf_badge.cpp

@@ -10,6 +10,7 @@
 #include "stdafx.h"
 #include "newgrf.h"
 #include "newgrf_badge.h"
+#include "newgrf_badge_config.h"
 #include "newgrf_badge_type.h"
 #include "newgrf_spritegroup.h"
 #include "stringfilter_type.h"
@@ -42,6 +43,15 @@ std::span<const Badge> GetBadges()
 	return _badges.specs;
 }
 
+/**
+ * Get a read-only view of class badge index.
+ * @return Span of badges.
+ */
+std::span<const BadgeID> GetClassBadges()
+{
+	return _badges.classes;
+}
+
 /**
  * Assign a BadgeClassID to the given badge.
  * @param index Badge ID of badge that should be assigned.