Expand documentation on graph projections and allow finer grained control

[cmungall]

Starting with #806 we have better documentation of OWL graph projections, but this could be improved, and aligned with other systems. There are also some potentially confusing aspects in that RG uses a reduced projection profile, so entailment results can look different from direct.

The challenge here is that as GPs become more inclusive, the more confusing a single triple becomes - longer term the solution here is to use a PG standard like owlstar to annotate edges.

current docs:

https://incatools.github.io/ontology-access-kit/guide/relationships-and-graphs.html#further-notes-on-owl-and-graph-projection

OWL Axiom	Graph Projection	SQL Adapter	Relation Graph
A SubClassOf B	rdfs:subClassOf B	Yes	Yes
A SubClassOf R some B	A R B	Yes	Yes
A SubClassOf R value B	A R B	Yes	No
A SubClassOf R only B	A R B	No	No
A SubClassOf R max 0 B	A R B	No	No
I type A	I rdf:type A	Yes	No
I type R some A	I R A	Yes	No
I type R value A	I R A	Yes	No
I Facts: R J	I R J	Yes	No

This doesn't include OBask neo4j2owl https://github.com/OBASKTools/neo4j2owl/blob/master/README.md#owl-2-el---neo4j-mapping-direct-existentials cc @hkir-dev