Translate noexcept conditions

[alandefreitas]

Mr. Docs needs to extract the noexcept condition and translate it into human readable terms

https://mrdocs.com/demos/develop/nlohmann-json/multi/adoc-asciidoc/nlohmann/swap-0e.html

The metadata should have a list of exception attributes, and the template should render them as a nice list in the exposition instead of in the declaration, which is ugly

[alandefreitas]

This is acceptable for now:

void
swap(
    reference left,
    reference right) noexcept( _see-below_ );

Exceptions: noexcept when std::is_nothrow_move_constructible<value_t>::value && std::is_nothrow_move_assignable<value_t>::value && std::is_nothrow_move_constructible<json_value>::value && std::is_nothrow_move_assignable<json_value>::value.