Macro impl_case_insensitive_enum_struct

macro_rules! impl_case_insensitive_enum_struct {
    ($enum_name:ident, { $($variant_str:expr => $variant:ident),* $(,)? }) => { ... };
}

Macro to implement case-insensitive deserialize for struct enum variants

Similar to impl_case_insensitive_enum but for enums where variants contain structs rather than simple types.