Merge Core library into Library, as with its utility functionality merged into Arbutils, it's becoming less and less useful.

src/Battling/Models/BattleSide.cpp

@@ -1,6 +1,6 @@
 #include "BattleSide.hpp"
 #include <algorithm>
-#include "../../Core/Exceptions/CreatureException.hpp"
+#include "../../Library/Exceptions/CreatureException.hpp"
 #include "Battle.hpp"
 
 using namespace CreatureLib::Battling;