/// Convenience [figment::Error] wrapper.
/// Uses a custom [OpStackConfigError] under the hood.
/// Extends a [figment::Provider] by warning about deprecated profile key usage.
/// Renames the [figment::Provider] `from` key to `to`.
/// Holds a [figment::Provider] that is used to retrieve a toml file.
/// Unwraps a profile reducing the key depth.
/// Wraps a profile increasing the key depth.