I have prepared a very nice article for sending text messages and want to publish it here on Stack Exchange. How to do that?
Short answer; you don't.
Stack Exchange is a series of question and answer sites; as such, it is not the appropriate place to simply post articles we have created on a particular topic.
We can certainly publish material we have written without somebody else asking about it, but we should/must also ensure that:
- We are formatting the content as a quality question and answer, and not a "how-to".
- We are posting a question that would be useful to other users.
- We are posting a question/answer that is of quality format, with an emphasis on "straight to the point", and direct, definitive answers over discussion-orientated ones.
- We are posting the content on a site where the content falls within the scope of both Stack Exchange, and what that site considers to be on-topic.
It is next to impossible to tell if your article would be appropriate anywhere, but it is certainly inappropriate for Stack Overflow (a programming-focused site). I can easily speculate that anything written as an article would still require extensive format to be left open, let alone received well. I would recommend looking for a blogging platform for self-publishing articles.