Add string_view header and sort includes in ContainerHelpers.hh (#413)

Author: mikesinouye

include/sta/ContainerHelpers.hh

@@ -24,14 +24,15 @@
 
 #pragma once
 
-#include <type_traits>
-#include <utility>   // for std::declval
+#include <algorithm>
+#include <functional>
 #include <map>
+#include <ranges>
 #include <set>
+#include <string_view>
+#include <type_traits>
+#include <utility>   // for std::declval
 #include <vector>
-#include <algorithm>
-#include <ranges>
-#include <functional>
 
 namespace sta {