## Summary
Add personality instructions so we can let users try it out, in tandem
with making it an experimental feature
## Testing
- [x] Tested locally
## Summary
Introduces the concept of a config model_personality. I would consider
this an MVP for testing out the feature. There are a number of
follow-ups to this PR:
- More sophisticated templating with validation
- In-product experience to manage this
## Testing
- [x] Testing locally