Project-scoped model selection

[taoeffect]

Description

Problem

I've often found myself wanting to run multiple crush sessions at once while having each session potentially use different models from different providers.

However, the model selection is globally scoped, so when you change the model in one crush session, it changes it for all the other sessions.

Solution

1. Have model selection be stored in <data_directory>/crush.json (this is .crush/crush.json by default)
2. Add a new menu item to the effect of "Save Model Choices As Default" to update the global config

Version

v0.66.0

Environment

Fedora Linux

[taoeffect]

*Err, to me this felt like a bug, but this might be a feature request. Please choose whatever label makes sense.