feat: 添加命令的帮助信息

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (5fa48dc) to head (0e5c6ed). Report is 5 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #324 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 6 6 Lines 394 394 ========================================= Hits 394 394 ```

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