docs: add clap-i18n-richformatter to Related Projects

Author: eatradish

src/lib.rs

@@ -62,6 +62,7 @@
 //! - [shadow-rs](https://crates.io/crates/shadow-rs) for generating `Command::long_version`
 //! - [clap_mangen](https://crates.io/crates/clap_mangen) for generating man page source (roff)
 //! - [clap_complete](https://crates.io/crates/clap_complete) for shell completion support
+//! - [clap-i18n-richformatter](https://crates.io/crates/clap-i18n-richformatter) for i18n support with `clap::error::RichFormatter`
 //!
 //! CLI Helpers
 //! - [clio](https://crates.io/crates/clio) for reading/writing to files specified as arguments