Unrecognized option `--verbose`

Running `multirust default stable --verbose` produces this output:

```
multirust: checking metadata version
multirust: got metadata version 2
multirust: cmd: default
multirust: toolchain: stable
multirust: option_name: --verbose
multirust: option_value:
multirust: unrecognized option --verbose
```

`multirust default --verbose stable` or `multirust --verbose default stable` doesn't work either.

The report names no files or tests. Start by reproducing `multirust default stable --verbose` and the two alternative argument orders, then trace the command's option parsing entry point. The issue does not define the intended verbose behavior or an acceptance condition, so confirm those with the maintainer before starting.

Written by the indexing model from the issue text.