Example Section 1-sim_to

[teubert]

First PR updating the examples to the new format.

This example introduces simulation. The first section (the subject of this PR) introduces the simulate_to method, and some features surrounding it (save_pts, save_freq, plotting results, etc.)

The next PR will introduce the simulate_to_threshold method along with the print, progress, horizon, and threshold_keys arguments

[github-actions[bot]]

Thank you for opening this PR. Each PR into dev requires a code review. For the code review, look at the following:

• [ ] Reviewer (someone other than author) should look for bugs, efficiency, readability, testing, and coverage in examples (if relevant).
• [ ] Ensure that each PR adding a new feature should include a test verifying that feature.
• [ ] All errors from static analysis must be resolved.
• [ ] Review the test coverage reports (if there is a change) - will be added as comment on PR if there is a change
• [ ] Review the software benchmarking results (if there is a change) - will be added as comment on PR
• [ ] Any added dependencies are included in requirements.txt, setup.py, and dev_guide.rst (this document)
• [ ] All warnings from static analysis must be reviewed and resolved - if deemed appropriate.