[Feature Request] Let `lms ps` show percentage when PROCESSINGPROMPT

[raarts]

The title describes this. I am running lms in the background on my Mac even when nobody is logged in, and I ssh into it when needed.
Currently lms ps shows something like this:

qwen3.5-27b   qwen3.5-27b   PROCESSINGPROMPT    16.54 GB    49152      1           Local     1h

I think it would be really informative to have:

qwen3.5-27b   qwen3.5-27b   PROCESSINGPROMPT(34%)    16.54 GB    49152      1           Local     1h