Modernize some of how program options emits help.

Alepha IOStreams supports adaptors for most of what used to be
temporary string functions.

ProgramOptions.h

@@ -327,8 +327,6 @@ namespace Alepha::Hydrogen  ::detail::  ProgramOptions_m
 			}
 	};
 
-	void printString( const std::string &s, const std::size_t indent );
-
 	struct OptionString { std::string name; };
 
 	namespace exports::inline literals