https://txtracer.ton.org/spec/doc/book/continuations/basics-register-c0-cc-savelist-if-instruction/https://txtracer.ton.org/spec/doc/book/continuations/diving-deeper-exit-points-of-continuations/https://txtracer.ton.org/spec/doc/book/continuations/manual-handling-and-jmp-vs-execute/