Format Ollama model list

[kborowinski]

Summary of the new feature / enhancement

@cnupy:

The /model command outputs Commands: usage text block with local Ollama model list.
In case where one has multiple models, the output becomes unreadable (as on included screenshot)

Would it be possible, either to:

• output the models, each in own line
• or skip the models from the usage text, since we can get them using /model list command

Edit: The /preset command behaves similarly, and outputs all presets in one line.

Proposed technical implementation details (optional)

1. Output models, each in separate line
2. Do not output models at all on /model command since we have /model list command:

Edit: The same should be applied to the /preset command