add section on comparing interventions using Vacamole model

using `{scenarios}` if appropriate, add[ example](https://github.com/epiverse-trace/tutorials/blob/299839d363b62d28f57dfa38449f5d2522ed05a0/episodes/compare-interventions.Rmd#L267) to `compare_interventions.Rmd` using Vacamole model vaccination versus no vaccination with visualisation of outcome of interest, include uncertainty in parameter values