* 🗃️ update and add fields in brains table
* ✨ update endpoints for more brain attribute
* ✨ new set as default brain endpoint
* 🔥 remove update brain with file
* ✏️ fix wrong auto imports
* 🐛 fix max tokens for model in front
* 🚑 post instead of put to set default brain
* 🚑 update brain creation endpoint with new fields
