quanticsgrids user guide

This library provides utilities for working with functions on quantics grids and for converting between quantics indices, grid indices, and original coordinates.

quanticsgrids provides two main layers:

1. Low-level discrete grids with integer coordinates
2. High-level discretized grids over continuous domains

Most users will want the high-level interface built around DiscretizedGrid. The following chapters mirror the Julia guide while using the Rust API and Rust idioms.