Update docs of command usage statements.

1. https://github.com/apache/answer/issues/1330
2. Currently, there are at least 3 missing sub-commands in the docs: `completion`, `config`, and `i18n`

<img width="1239" alt="Image" src="https://github.com/user-attachments/assets/92f2dddb-6a53-4087-ab2f-66725e74e9fe" />