C++ Macro compatibility

[KaruroChori]

Following the trail of #422, to improve the wider compatibility with C++ some macros would require minimal rework.

https://github.com/quickjs-ng/quickjs/blob/22c10224ac9885051ada62ac11a1d6e55593042b/quickjs.h#L960C1-L975C145

For reference, an equivalent problem discussed in saghul/txiki.js#535

[chqrlie]

This seems a good change. This allows a C++ module to define an array of properties using these macros without an explicit extern C++ tag.

[KaruroChori]

#428