- save() writes <config>/config.toml (atomic temp+rename), flat keys
at the top level and group/sub keys as [group] tables, values as
native TOML int/float/bool/string (non-finite doubles degrade to
strings and restore via the declared type)
- load() prefers config.toml; a legacy config.ini (C++ or pre-TOML
Rust builds) is read once and immediately re-persisted as TOML; the
INI file is left in place; a corrupt TOML is reported, never
silently discarded
- cd.yml: drop a stale oakengine comment (the crate is retired)
Mike-Solar
12ffce77db