LiveData: Initial implementation

Add support for live data subscription via Device::subscribeLiveData() and
Device::unsubscribeLiveData(). The live data API can be used to subscribe to
individual "signals", a full list of which can be found in LiveDataValueType.

include/icsneo/device/tree/neovifire3/neovifire3.h

@@ -75,6 +75,8 @@ protected:
 
 	bool supportsWiVI() const override { return true; }
 
+	bool supportsLiveData() const override { return true; }
+
 	std::optional<MemoryAddress> getCoreminiStartAddressFlash() const override {
 		return 33*1024*1024;
 	}