Upgrade to WiFi Connect v4

[majorz]

We need to update the code of this example application to use WiFi Connect v4, since it contains breaking changes and the current example application is not compatible with it.

[shaunmulligan]

@majorz should we update this or should we deprecate this project?

[majorz]

@shaunmulligan I have the required hardware available already. I just forgot about updating this. It will not take me much time and I can update it just to finish the urgent tasks here.

Just a thought here: once we release our official API, this project may become more interesting - not sure how yet, but I think we should keep it.

[shaunmulligan]

@majorz sounds great 👍

[basz]

Any quick notes on what the changes are? Or should I be able to get this going?