Allow `-max-ai-credits=0` when using local models

### Describe the feature or problem you'd like to solve

I'd like to be able to use local models with `/remote` without the possibility of accidentally using credits in that session

### Proposed solution

Remote the validation on `-max-ai-credits` that requires that it is >= 30.

### Example prompts or workflows

_No response_

### Additional context

The limit of 30 seems totally arbitrary, and when using a local model it doesn't mean anything. When testing with local models, it would be nice to know for sure that we can't accidentally use credits.

Comienza localizando la validación de la opción `-max-ai-credits` y el código que identifica los modelos locales cuando se usa `/remote`. Confirma el mínimo actual de 30 y, después, verifica que se acepte un valor de 0 para el flujo de trabajo con modelos locales y que la sesión no pueda usar créditos inesperadamente.

Escrito por el modelo de indexación a partir del texto del issue.