Feature request: keras.ops.unravel index

Feature request: keras.ops.unravel index: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm writing backend-agnostic code on top of keras.ops so the same script runs on JAX, TensorFlow and PyTorch backends. A pretty common pattern I have is: flatten a tensor…