Additional categories

We have a to-do to add 2 other categories.

https://github.com/AeroRust/AeroRust.github.io/blob/a9574c635c4958aea8677334531c121965705b4a/scraper/config.toml#L1

This issue aims to:
- [ ] Add a `Simulation` category - we have at least 1 project listed in #6 that is in this category.
-[ ] Discuss whether we need to add `Mission planning` and which crates should go inside

### Suggest new categories commenting or mentioning this issue in your PR