feat: add occ command to list mail accounts

[SebastianKrupinski]

Summary

• Added command to list mail accounts

Usage

List for single user
occ mail:account:list 'user name'

List for all users
occ mail:account:list --all

List with full details
occ mail:account:list --all --full

Output

List all users

List single user

[ChristophWurst]

With the exception of a list all accounts on the system this duplicates https://github.com/nextcloud/mail/blob/main/lib/Command/ExportAccount.php more or less

[SebastianKrupinski]

With the exception of a list all accounts on the system this duplicates main/lib/Command/ExportAccount.php more or less

Yeah I agree, I didn't realize the export command displayed the information. We can kill it, I didn't spent that much time on it... or we can also add the ability to search for specific values, which might be handy... Like list account that not using SSL, or using specific ports... etc... it wouldn't be much effort

[ChristophWurst]

For these specific queries one can always resort to the database. I don't think it's worth developing and maintaining a command for this.

[SebastianKrupinski]

Okay, no problem