/*!
Physics in Parallel crate root.
Purpose:
This crate provides layered infrastructure for physics-oriented numerical
simulation:
- `math` defines scalar, tensor, matrix, vector-list, random-fill, and math IO
foundations.
- `space` adds continuous and discrete spatial semantics on top of math
containers.
- `engines` provides model-agnostic runtime storage and interaction backends.
- `models` provides concrete physical model pieces that use the lower layers.
The crate-wide prelude re-exports the common user-facing API from all ready
layers:
`use physics_in_parallel::prelude::*;`
*/