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

[d4rkstar]

• I have searched the 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 <repo-url>

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