fix: fix utf-8 output error.

- I figure out how UTF-8 output bug happend, but I don't have any clues proving why this happend.
	- it seems that we can simply remove utf8 string literal heading to solve this issue (u8"" -> "")
	- the compiled string char array in executable application already is wrong.
	- compiler generated string bytes is `'original string'.encode('utf-8').decode(your pc encoding).encode('utf-8')`.
	- idk why, as the compromise, I remove all utf8 string literal heading to solve this issue.
	- I highly think this is a bug of MSVC. because everything is okey if I use MSVC native project file to build.
	- I have compared the build flags between native project and cmake generated project but I can't find any difference.
- add full testbench code for ParserHelper.

src/ParserHelper.hpp

@@ -57,7 +57,8 @@ namespace YYCC::ParserHelper {
 			return false;
 		}
 	}
-	bool TryParse(const std::string& strl, bool& num) {
+	template<typename _Ty, std::enable_if_t<std::is_same_v<_Ty, bool>, int> = 0>
+	bool TryParse(const std::string& strl, _Ty& num) {
 		if (strl == "true") num = true;
 		else if (strl == "false") num = false;
 		else return false;