Issue: click.Choice token normalization not visible in error/help, missing Enum support

Issue: click.Choice token normalization not visible in error/help, missing Enum support: a task in LegoFlow-SWE (Harbor dataset). click.Choice can apply a token normalize func from the context (e.g., lambda x: x.lower() ) to match user input against the allowed choices, but the display of those…

The task

`click.Choice` can apply a `token_normalize_func` from the context (e.g., `lambda x: x.lower()`) to match user input against the allowed choices, but the *display* of those choices in error messages and `--help` metavars still shows the **original** (un‑normalized) values. This is confusing because the error text…

Part of Lego-X/LegoFlow-SWE.