Provides derive macros for `indexland`. For better ergonomics add the
`"derive"` feature to `indexland` instead of depending on this directly.
```rust
// [`indexland_derive::Idx`](indexland_derive::Idx) is re-exported by indexland
use indexland::Idx;
struct NodeId(u32);
enum PrimaryColor {
};
```
[MIT](../../LICENSE)