Evaluate Z-order indexing for types, iterators, and tuples of BitCollections.
Example
```
use zdex::*;
fn main() -> Result<(), std::io::Error> {
let v1: FromU8 = 0b0011.into();
let v2: FromU8 = 0b1111.into();
// Prints "Vob[01011111]".
println!("{:?}", (v1, v2).z_index()?);
Ok(())
}
```
Todo
- [ ] docs example: custom BitCollections
- [ ] docs example: practical example with z-order index ranges
- [ ] docs example: manipulating result vob
- [ ] docs quality: rustdoc + docs.rs link
- [ ] key feature: z-indexes over heterogeneous bitcollections
- [ ] key feature:
is_relevant and next_jump_in
- [ ] feature: iterator over sub-ranges (Page Jump Querying heuristic)