Library of generic go-to interactions which can be applied across multiple pathways

[JRPearson500]

It is very likely that many pathways will have a common set of interactions, for example, booking an appointment, or the chance of
the patient developing a cold or flu and then going to the GP and being prescribed some medication.

To save rewriting code, it would make sense to develop a bank of common interaction functions which could be imported across
different pathways.

Some simple common interactions (such as the cold example above) may not be too complex. Some work would be required to
implement a method to refer to these go-to interaction modules inside of the Template Language, especially if all the scripts
containing these features all live in different directories, but this should not be too difficult.

Developing common functions for something such as all cancer pathways would be a more complex task, but would undoubtedly
be a powerful resource.