commands now accept multiple arguments where it makes sense.
#### before
```
NAME:
tea issues close - Change state of an issue to 'closed'
USAGE:
tea issues close [command options] <issue index>
```
#### after
```
NAME:
tea issues close - Change state of one ore more issues to 'closed'
USAGE:
tea issues close [command options] <issue index> [<issue index>...]
```
Co-authored-by: Norwin <git@nroo.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/512
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.io>
Co-authored-by: Norwin <noerw@noreply.gitea.io>
Co-committed-by: Norwin <noerw@noreply.gitea.io>