Creation of Interoperability Test Sets for File Toolkit

[al-fisher]

Nominating File_Toolkit as the next priority candidate for implementing Interoperability Test Sets.

Following the success of some of the Structural Adapters this will be a good use case to:
a) generalise InteroperabilityTestEngine further and
b) integrate into a specific CI check with BHoMBot, as naturally requires no proprietary licences.

This may need some workshopping to generalise for File workflows - beyond what @IsakNaslundBh has implemented specifically for Structural Adapters.

@alelom what do you think? 😄
Do you want to plan a session at some point with perhaps with @IsakNaslundBh @FraserGreenroyd also