Tutorial & training slides improvements

[GiudGiud]

Reason

This is from a separate training than the one we ran in June. This is mostly my personal opinion of things we can add + suggestions from others I wrote down

Design

• [ ] add a sloshing picture to FSI module
• [ ] add a slide on the review process and/or SQA
• [ ] Add square lattice to reactor module description
• [ ] Make two slides for lists of transfers, and separate them into what kind (field, others)
• [ ] dont use spatial UO for explanation of transfers, use something simpler. SpatialUO explanation has to almost dive into the code to say when it works
• [ ] add discourse forum links when talking about each app, add to mooseframework website too

Impact

Better base slides for trainings