Add a simple commandline parser example.

Also cleaned up a few files.  Since these were pulled from various
scratch repos from informal ISO discussions over the years, they don't
quite line up.  This at least gets everything building again.

word_wrap.h

@@ -4,6 +4,8 @@ static_assert( __cplusplus > 2020'00 );
 
 #include <cstddef>
 
+#include <string>
+
 namespace Alepha::inline Cavorite  ::detail::  word_wrap
 {
 	inline namespace exports
@@ -11,3 +13,8 @@ namespace Alepha::inline Cavorite  ::detail::  word_wrap
 		std::string wordWrap( const std::string &text, std::size_t width, std::size_t nextLineOffset= 0 );
 	}
 }
+
+namespace Alepha::Cavorite::inline exports::inline word_wrap
+{
+	using namespace detail::word_wrap::exports;
+}