Devin Incerti

Fix incorrect spelling of "auxiliary": - "auxillary": [here](https://github.com/hesim-dev/hesim/blob/0f04561f29c0dcfa1bbc827774e55e9749166b4d/tests/testthat/test-params_surv.R#L19) - "auxilliary": [here](https://github.com/hesim-dev/hesim/blob/ce162a4324723e792de3c63a81dc9a55fba28e78/R/params_surv_list.R#L68) and [here](auxilliary)

A function based on the existing `IndivCtstmTrans$sim_disease()` method could be created so that users can simulate example multi-state data. The difference from the existing output is that there should be...

This would be a useful feature to add.

Style package using https://styler.r-lib.org/.

As documented [here](https://lintr.r-lib.org/articles/continuous-integration.html).