[CLI] ops -plugin doesn't list installed plugins

- [X] I have searched the [issues](https://github.com/apache/openserverless/issues) of this repository and believe that this is not a duplicate.

### Ⅰ. Issue Description

### Ⅱ. Describe what happened
The command `ops -plugin`, used to add plugins to `ops` works well when installing plugins. It don't list installed plugins.

```
$ ops -plugin
Usage: ops -plugin

Install/update plugins from a remote repository.
The name of the repository must start with 'olaris-'.
error: invalid number of arguments. Expected 1
```

### Ⅲ. Describe what you expected to happen
We expect that the command `ops -plugin` without other arguments, will listi installed plugins

### Ⅳ. How to reproduce it (as minimally and precisely as possible)

n/a

### Ⅴ. Anything else we need to know?

n/a

### Ⅵ. Environment:

- K8S Runtime and version: n/a
- OPS CLI version: v0.1.0-2501041342.dev
- Others: n/a