Port case studies

[aloctavodia]

I am using the following convention

- [] not ported
- [x] ready
🚧 ported but not yet rendered (needs double checking)

• bioassay
• birthdays
• cat_adoptions
• coronavirus
• declining_exponentials
• digits
• dogs (Only partially ported)
• dogs_stan
• exercises
• golf
• loo_comparison
• misc
• movies
• multiple_choice
• nabiximols (moment matching missing, we currently need to define some functions manually waiting until we have more automatic functionality)
• park_rule
• planetary_motion
• problems
• roaches
• sbc
• sharks
• sleep_study dogs (Partially ported)
• timeseries
• variable_selection
• world_cup