Add -a and -A support

[yajo]

Description

Common workflow:

git add -A
cz c

Boring. Could be better with a single command.

Possible Solution

cz c -A

Adds all changed files and issues the commit subcommand.

Additional context

Git also adds one of these shortcuts: git commit -a. So it seems to make sense...

Additional context

No response

[Lee-W]

I think this one is finished in #821. Feel free to reopen it if this is not the case 🙂 Thanks @Ellie-Yen for reminder