Can't serialize arbitrary std::ranges::viewable_range

This code doesn't compile: 

```
struct Person {
    std::string name;
    int age = 0;
};

int main() {
    auto [data, in, out] = zpp::bits::data_in_out();
    std::vector<Person> people(5);
    in(std::views::transform(people, [](const auto& p) { return p.name; }));
    out(std::ranges::subrange(people.begin(), people.begin() + 3));
}
```