cherry picking macro

Cherry pick nested value from JSON-ish data and collect results into a tuple. Easily implementable in terms of `query_value`, but we need some optimization?

syntax draft:

`pick_values!(|obj| (.foo, .bar, .baz[0]))`

->

```rust
// Some((...)) if all query results in Some, otherwise None
(|| Some(
    (query_value!(obj.foo)?, query_value!(obj.bar)?, query_value!(obj.baz[0])?)
)()
```

