There are different ways to approach it. One is to attach it as a file to a post. The "Programming" section would be ok because it's for use in program development. Another way is to submit it Mike Naberezny (6502.org owner) and ask him to put it in the
tools section of the website, but be aware that it will be very difficult and slow to make changes after it's there, so I would encourage hosting it on your own site or github or something at least until you're convinced no further changes will be made. As a last resort, you could probably invite people to ask you to email it to them, although that probably won't result in nearly as much circulation.