tuya_light: restore light state from Tuya MCU instead of ESP flash memory

**Describe the problem you have/What new integration you would like**

On Tuya-MCU enabled devices, the second MCU is usually responsible for saving and restoring light state. I suggest to add option to restore light state from it instead of setting some deafult value (restore_mode: ALWAYS_ON ...) or restoring from ESP flash (restore_mode: RESTORE_DEFAULT_ON ...).

**Please describe your use case for this integration and alternatives you've tried:**

**Additional context**

Start by tracing Tuya-MCU light-state handling and the existing restore_mode behavior. Determine how the MCU's saved state can be used instead of the ESP flash value or a default, then verify that the new option restores the expected light state on Tuya-MCU devices.

Written by the indexing model from the issue text.