✨ Add model field to agent schema and forms

✨ Add Assistant support to chat participants and contacts
✨ Add initial agent hookup (#1799)
✨ Scheduled Trip/Conversations Emails (#1796)
✨ Add advanced settings view for assistants with JSON editor
✨ Add agent and assistant field types to creatable select options
✨ Add agent status, icon, color and default icons for custom field types

✨ Add configuration extras to integrations and improve JSON editor support
✨ Add place icon and cover photo to destination places list

✨ Add magic wand feature and update UI components for consistent styling
✨ Add magic wand feature for generating photos in destinations, products and suppliers
✨ Adds a simple image preview on gallery