detect external instance on startup

[loulou64490]

Is your feature request related to a problem? Please describe.
When you have Ollama already installed, I'ts would be more smart to propose to user to switch to external instance automatically with a pop-up

Describe the solution you'd like
Alapca try http://127.0.0.1:11434/ on startup or fisrt launch to see if ollama is already installed

Describe alternatives you've considered
doing it manually