Provide notice that run_neon is running

[TeaganKing]

There are numerous errors that appear when running run_neon, and it is a bit unclear whether or not run_neon is actually running via console output. It'd be great to have a statement printed that says something along the lines of "Run NEON is actively running as expected".

[wwieder]

During the NEON tutorial @danicalombardozzi made the following suggestions, which seem connected to this issue.

1. running the 'run_neon' code block ends with a 'data not found' line and it isn't evident when it is finished running. Adding a print statement at the end that says 'simulation submitted to queue' or similar would be helpful.
2. when the jupyter cells complete, people think that the model completes and then they get an error in the 'ls' step. Update the text to make it more obvious that the model needs to complete before they will be able to see the files.