Hi Bob and welcome,
Before we could even consider adding the sortedcontainers library to the standard library, we would need to hear from the maintainer(s) of the library that they agree to the move and would be able to continue maintaining the library under our release schedule and backwards compatibility guarantees.
Otherwise, you would need to find a core developer willing to re-implement the containers and maintain them.
I don't want to discourage you, but even if the maintainer is willing, we night not decide to add it. Every new feature, class and function adds to the weight of learning Python, and the cost of maintenance. We must balance that against the benefit, and only add features where the benefits are greater than the costs.
Our decision making is usually very conservative, because we have strong requirements for backwards-compatibility. Once we add something to the stdlib, we can't easily change our mind and remove it again. So we follow the Zen of Python:
>>> import this The Zen of Python, by Tim Peters [...] Now is better than never. Although never is often better than *right* now.
Have you looked at the Python PEPs? If you are serious about pushing this proposal, your first step should be to read PEP 1 and then browse through the collection of successful and unsuccessful PEPs:
https://www.python.org/dev/peps/pep-0001/
https://www.python.org/dev/peps/