Torch setup for dark environments

AI will struggle when the scene is too dark.

The Captur camera supports torch mode (continuous light) to help in low-light situations.

pass isFlashOn when initialising the CapturCamera

The CapturCamera or CapturUltraWideCamera can be initialised with a isFlashOn parameter.

This is a state variable that can be updated during runtime, for example if the user toggles the flash from the UI, or if the SDK returns a guidance event for too_dark

The recommended implementation is to base this on the OS detect low-light conditions (if available), or use a time-of-day heuristic, matching standard best practices for QR code scanning.