Textures and sprites are now managed by a single module in textures.hpp, and even though it is a _single_ location to access all sprites it is NOT a singleton. Those are illegal.

tests/textures.cpp

@@ -1,7 +1,7 @@
 #include <catch2/catch_test_macros.hpp>
 #include <fmt/core.h>
 #include <string>
-#include "textures2.hpp"
+#include "textures.hpp"
 
 using namespace fmt;