How can I destroy Thread from the main?
As far as Japanese this function is located in https://github.com/nim-lang/Nim/blob/devel/lib/system/threads.nim but commented. But I NEED IT!
The terminology for destroying a thread in multithreading is join (from fork-join parallelism).
So what you want is joinThread: https://nim-lang.org/docs/threads.html#joinThread%2CThread%5BTArg%5D
I agree it's confusing but that comes from papers from 30 years ago.