fix: change the behavior of printf in string op.

- add compiler hint for checking the arguments of printf.
- change the return value of printf. from std::expected to normal value. use C++ exception to indicate error.
	* the error of printf usually caused by programmer. so it can be found when testing program.
	* so i use std::logic_error to indicate this and programmer should fix this before releasing program.
- change the use of encoding convertion. for those cases that convertion must be safe, we unwrap it directly.

src/yycc/carton/wcwidth.hpp

@@ -31,7 +31,6 @@ namespace yycc::carton::wcwidth {
 
     /// @brief Error occurs in this module
     enum class Error {
-        BadEncoding,   ///< Given
         BadAnsiEscSeq, ///< Bad char when processing ANSI Escape Sequence
         BadCsiSeq,     ///< Bad char when processing CSI Sequence.
     };