Make it possible to run hyrax package as a script, aka `python -m hyrax`

Nobody has claimed this yet.

**Feature request**

Python environments are complicated and error-prone, so it is nice to have the opportunity to run Python scripts with `python -m module_name` instead of `script_name`. You can do it with a lot of common Python packages, e.g. `python -m http.server`, `python -m pip`, `python -m venv`, `python -m cmake`, etc. It would be nice to have `python -m hyrax` too!

This may be done by introducing a `__main__.py` file in the root of the hyrax package.

**Before submitting**
Please check the following:

- [x] I have described the purpose of the suggested change, specifying what I need the enhancement to accomplish, i.e. what problem it solves.
- [ ] I have included any relevant links, screenshots, environment information, and data relevant to implementing the requested feature, as well as pseudocode for how I want to access the new functionality.
- [x] If I have ideas for how the new feature could be implemented, I have provided explanations and/or pseudocode and/or task lists for the steps.

Start by inspecting the root of the hyrax package and the proposed __main__.py entry point. Run `python -m hyrax` after the change and confirm that it invokes the package successfully, matching the requested script behavior.

Written by the indexing model from the issue text.