To have regenerative braking, you'd need a hub motor or a bottom bracket motor with a fixed hub and the freewheel on the crank, which admittedly does exist, just not in conjunction with a motor in the bottom bracket AFAIK.
You'd also need some way of controlling the regenerative and friction brakes together. No, it cannot be separate levers. A lot of casual cyclists don't use their front brakes because they're worried that they'll go over the bars.
You'd also need some way of controlling the regenerative and friction brakes together. No, it cannot be separate levers. A lot of casual cyclists don't use their front brakes because they're worried that they'll go over the bars.