## wrkflw-matrix
Matrix expansion utilities used to compute all job combinations and format labels.
- Supports `include`, `exclude`, `max-parallel`, and `fail-fast`
- Provides display helpers for UI/CLI
### Example
```rust
use wrkflw_matrix::{MatrixConfig, expand_matrix};
use serde_yaml::Value;
use std::collections::HashMap;
let mut cfg = MatrixConfig::default();
cfg.parameters.insert("os".into(), Value::from(vec!["ubuntu", "alpine"])) ;
let combos = expand_matrix(&cfg).expect("expand");
assert!(!combos.is_empty());
```