[Feature] Update Image generation

[sebiweise]

Image generation will be or was added in PR #122. There are still some optimizations needed:

• [ ] Update styles to make the image smaller and more responsive
• [ ] Optional persist image on supabase (url return is only available for aber 1 or 2 hours)
• [ ] Add additional params for Dall-E
• [ ] Update ai.models.ts to reflect the correct settings for dall-e 2/3
• [ ] Remove the image modules from the system_prompt modals
• [ ] Add documentation

Current Example: