The headlights are fused
in the rear of the bike, so I'm sure you can put a switch somewhere.
The tail light, turnsignal, and "parking lights" are not. They are controlled or at least monitored by the ECU - they're CANBUS devices. I don't think you can control them with just a simple switch. You'd mess up their signal to the ECU.
What are you thinking? Track days? Or sneaking home after staying out too late? I'm guessing running from the cops is what you are looking for. Bad idea if so.
For track junkies here is the cure.
Pull the fuses for the headlights. That's easy.
For the taillight/stoplight there is a connector right under the rear cross-member of the tail. Crappy location, but not that hard to disconnect once you know how it works.
Rear turnsignals also have a connector in the tail that lead down and out the right. Unplug it or even remove the entire assembly with the three screws. Also easy.
Front turnsignals take some work to remove, and even worse are the parking lights. Just tape 'em up.