Increase commandLine length limit

[RMacfarlane]

The current limit, 512 characters, is rather low. See if there is a way to increase this limit

[Tyriar]

Maybe we can just up it to 4096? I don't think it's much of a hit if that's too high generally.

[RMacfarlane]

The default stack size seems to be 984kb (node --v8-options | grep -A1 stack_size), so to increase it that much, it needs to be run with a higher stack size. Do we do that in VS Code?

I tried changing ProcessInfo process_info[1024] to ProcessInfo* process_info = new ProcessInfo[1024] to allocate on the heap, deleting at the end of HandleOkCallback in the worker, but this causes the "should handle multiple calls gracefully" test to always fail with an access violation error.

One workaround would just be to flip the size of the process_info and commandLine arrays, so that we only read up to 512 processes and read up to 1024 chars of commandLine

[Tyriar]

@RMacfarlane I think I made it that high initially because I was surprised at the amount of processes being returned. Maybe it needs to be done in multiple passes then? Would be good not to compromise on either.