repl: how to send multi line snippets

[kootenpv]

continuing from #1832 and working with the latest repl commit branch

I am unsure how I can send multline, as \n is not valid

also just copy pasting into the repl multiple lines just executes them independently and gives a syntax error

when I write to file what is being sent to the repl, this is how it succesfully works for a single line:

["/run-code\x00\x00\x00,is\x00\x00\x00\x00\x01", "play", "60", "\x00\x00"]

but how can this be extended to allow sending e.g.:

play 60
play 64

?