add new examples

bin/logger/main.cpp

@@ -0,0 +1,14 @@
+#include <set>
+
+#include "hack/logger/logger.hpp"
+
+auto main(int argc, char *argv[]) -> int
+{
+  std::set<int> s { 1, 2, 3 };
+  hack::log()(s);
+
+  std::vector<int> v { 1, 2, 3 };
+  hack::log()(v, s);
+}
+
+