FroidurePin implementation

[jswent]

This issue tracks the full implementation of the FroidurePin algorithm in Semigroups.jl

• Add runner base class Add runner base class #29
• Add WordGraph binding Add minimal, read-only WordGraph binding for FroidurePin instantiation #30
• Add FroidurePinBase binding Add FroidurePinBase binding #31
• Add FroidurePin template instantiations
• Add helper functions
• Add high-level FroidurePin Julia API
• Comprehensive testing
• (Future) Additional element types

[jswent]

@james-d-mitchell does this look like a good order to you? lmk if i'm missing anything

[jswent]

or @Joseph-Edwards perhaps you have any notes from the python bindings work?

[james-d-mitchell]

That looks good to me, there's a great deal of stuff related to WordGraphs it might be too much, probably I can help with this when I have a little time.