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foundations-macros: add Display derive for trivial struct/enum Display - #279
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A simple way to quickly implement Display implementations on structs and enums, inspired by `thiserror` but not specifically for errors. Although, errors are a good reason for this (`std::error::Error`'s trait bounds require `Display`), so we also add a convenience derive named `Error` that adds the `impl Error for T` automatically. This is enabled by setting the "derive" feature.
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A simple way to quickly implement Display implementations on structs and enums, inspired by
thiserrorbut not specifically for errors.Although, errors are a good reason for this (
std::error::Error's trait bounds requireDisplay), so we also add a convenience derive namedErrorthat adds theimpl Error for Tautomatically.