`--allow-empty-message` commit

**Is your feature request related to a problem? Please describe.**
cannot commit without commit message:


**Describe the solution you'd like**
allow empty commit message via

```
git commit --allow-empty-message -m ""
```

**Describe alternatives you've considered**

add custom command like:

https://github.com/jesseduffield/lazygit/wiki/Custom-Commands-Compendium#user-content-add-empty-commit

However, I think it's better to create it by simply pressing Enter in the "commit summary" prompt.

**Additional context**
similar feature request: https://github.com/jesseduffield/lazygit/issues/2439