feat: support line wrapping for Binary in literal syntax

[sxrzh]

Fix #1287.
Support line wrapping for Binary in literal syntax.
The line wrapping length is 80 by default, which means each line (indentation included) doesn't exceed 80 characters in literal Binary. This length could be manipulated through out << YAML::Wrap(len), and Wrap(0) means disabling the wrapping.

If current indentation exceeds the wrapping length (not 0), Utils::WriteLiteralBinary will return false without any exception, just like other functions in emitterutils.cpp.

[SGSSGene]

Thank you for this PR! this finally makes larger binary data possible!

[SGSSGene]

Minor: add spaces after if and for. Also added curly brackets for the else case.

Suggested change

	if(wrap) {
	if(wrap <= indent) return false;
	wrap -= indent;
	std::size_t point = wrap;
	for(std::size_t i = 0; i < encoded.size(); i++) {
	if(i == point) {
	wrapped += '\n';
	point += wrap;
	}
	wrapped += encoded[i];
	}
	}
	else
	wrapped = encoded;
	if (wrap) {
	if (wrap <= indent) return false;
	wrap -= indent;
	std::size_t point = wrap;
	for (std::size_t i = 0; i < encoded.size(); i++) {
	if (i == point) {
	wrapped += '\n';
	point += wrap;
	}
	wrapped += encoded[i];
	}
	}
	else {
	wrapped = encoded;
	}

[SGSSGene]

This is an oversight from the other PR. If I see correctly WriteLiteralString is always true, but I think we should pass the return value if one day someone changes WriteLiteralString to return something else.
(The return true; in the next line should be removed)

Suggested change

	WriteLiteralString(out, wrapped.data(), wrapped.size(), indent);
	return WriteLiteralString(out, wrapped.data(), wrapped.size(), indent);

[SGSSGene]

Even though it is not directly related. Could you return the value from WriteSingleQuotedString instead of returning always true?

[sxrzh]

Sure!

[sxrzh]

Done. Thanks for your hard work.