derive docs from ttl

[cmungall]

consider using specgen or others from here: https://www.w3.org/2011/prov/wiki/Generating_HTML_documentation_of_OWL

[cmungall]

Note: the current docs are generated using owldoc in Protege but imo they don't look so great

[cmungall]

Seems like specgen is used a lot https://github.com/specgen/specgen

I like these docs https://www.w3.org/TR/vocab-ssn/#SOSASample