former 2.48.0

A flexible implementation of the Builder pattern supporting nested builders and collection-specific subformers. Simplify the construction of complex objects.
Documentation
# Docs

## Scope

Design and API documentation for `former`.

### Responsibility Table

| File | Responsibility |
|------|----------------|
| `entities.md` | Cross-entity index: all active doc entity types and instances |
| `doc_graph.yml` | Machine-readable cross-reference graph of all doc instances |
| `algorithm/` | Algorithm doc entity — computational procedures used during macro expansion |
| `api/` | API doc entity — attribute contracts for macro configuration |
| `feature/` | Feature doc entity — user-facing macro capabilities as navigational hubs |
| `invariant/` | Invariant doc entity — hard constraints on supported types |
| `pattern/` | Pattern doc entity — design patterns implemented or enabled by the macro |
| `ide_support.md` | Source document — IDE setup guidance for rust-analyzer and editors |
| `performance.md` | Source document — performance analysis and compile-time benchmarks |