Projectkk2glider/botloader nano lib

I pushed this to `next` commits https://github.com/opentx/opentx/commit/05cfad13ea89d03638c28e0e5de3a009320bb5f6 and https://github.com/opentx/opentx/commit/f69e6c174e9324743f3f43b97940861fa23d93cd