Triangulation primitives for the RustUse geometry workspace.
`use-triangulation` stores indexed triangle connectivity and construction method labels.
```rust
use use_triangulation::{Triangulation2, TriangulationMethod};
let triangulation = Triangulation2::new(vec![[0, 1, 2], [0, 2, 3]]);
assert_eq!(triangulation.triangle_count(), 2);
assert_eq!(TriangulationMethod::EarClipping.name(), "ear-clipping");
```