Trigger and monitor an OTA firmware update for a Z-Wave device via the zwave-js firmware update API

Steps

1. Call node.getFirmwareUpdateCapabilities() (or the cached variant) to check firmwareUpgradable and available firmwareTargets before offering an update
2. Prepare the image: guessFirmwareFileFormat(filename, rawData) to detect otz/ota/hex/hec/gecko, then extractFirmwareAsync(rawData, format) to get a Firmware object (use tryUnzipFirmwareFile first if it's a ZIP)
3. Call node.updateFirmware([{ data, firmwareTarget, firmwareId }, ...]) — firmwareTarget 0 updates the Z-Wave chip, >=1 targets other onboard chips
4. Listen for the node's "firmware update progress" event during the transfer and "firmware update finished" (or the resolved updateFirmware Promise) for the final FirmwareUpdateResult
5. Use node.isFirmwareUpdateInProgress() to poll state and node.abortFirmwareUpdate() to cancel an active transfer
6. In Z-Wave JS UI, do the GUI equivalent: device Advanced panel > Firmware update > Begin, pick the file, set Target to 0, and watch progress in the UI