AI Model Serving Auth Token Resource schema.

## Example Usage

### Automatically rotate AI model serving token
```terraform
resource "time_rotating" "rotate" {
    rotation_days = 80
}

resource "stackit_modelserving_token" "example" {
    project_id = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
    name       = "Example token"
    
    rotate_when_changed = {
        rotation = time_rotating.rotate.id
    }

}
```