Support ZIP files for firmware updates

[AlCalzone]

This will have to be limited to ZIP files containing a single firmware update file.

[sdrsdr]

As a whole the process of firmware update is not documented. At least I could not find any clue. My feeling is that I (as a zwave-js library user) need to extend the Firmware Update Meta Data CC to somehow provide sendFirmwareFragment and then trigger the process via requestUpdate OR is there a magic registry that will allow simple requestUpdate and then the library will find all it need and do the dance ending with activateFirmware. If there is a registry with known udpates-to-specific-device simply unpacking and publishing from the zip to it will be enough

[AlCalzone]

As a library user you shouldn't deal with the CCs directly for this. --> https://zwave-js.github.io/node-zwave-js/#/api/controller?id=updating-the-firmware-of-a-node-ota

[sdrsdr]

Thank you very much for the link. I see now how ota is supposed to work. Having some pointers in the source code and in the 'Advanced usage' or 'FAQ' section of the documentation wold be very usefull.