Preliminary results visualisation for all scenarios

[SamuelBrand1]

This is a meta-issue for getting everything in place for prelim results following on from discussion #24 .

• Direct interface from scenario definition to methods  #352
• As of new do_pipeline method for multiple scenarios #349 we have Example mode only drawing a small number of posterior samples. Useful to have a full pass with a small number of posterior samples to have a concrete set of output to test visualisation too (this can be done by passing down to the make_epimethod ndraws kwarg.
• Update pipeline script to ingest multiple scenarios
• Fig1 code #362
• Modify Fig1 to split between main and SI figs #374
• Fig2 code #378
• Scoring and Fig3 code #390
• Full run. #432