BHoM_Adapter: Expand the comparer and venn diagram framework

#### Description:

Scope to expand and improve the current framework used for identifying objects that are the same, which currently rely on the system EqualityComparers. Could expand this to allow for different structures, so that collections like the DomainTree and/or PointMatrix could be used for geometric comparisons. This could lead to a speed up and greater ability to customise how this process is done.

Need some proper thought and planning before implementation, but raising now as issue while on my mind!