feature: show single-char aliases first in help

feature: show single-char aliases first in help: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). If you look at the help message of nix programs, many of them (especially GNU programs) have a format like this: <details <summary Examples (click to expand)</summary </details…

The task

If you look at the help message of nix programs, many of them (especially GNU programs) have a format like this: <details><summary>Examples (click to expand)</summary> </details> Note that single-char aliases are always put first, and any option without a single-char alias is…

Part of XiaomiMiMo/MiMo-V2.6-RL-oss.