fix(civil): adds top level cogopoint converter

[clairekuang]

Cogopoints were not properly supported because the full type name of the class is Autodesk.**Civil**.DatabaseServices.CogoPoint, but the inheritance is Autodesk.**Autocad**.DatabaseServices.Entity.
This means that the top level civil converter is not registering a converter correctly, since cogopoints inherit from autocad entities not civil entities and we have no top level entity converter in autocad.

This pr fixes the issue by introducing a top level CogoPoint converter in civil and converting it as a DataObject just like all other civil objects. Includes the point name, number, and northing props.

sample model: https://latest.speckle.systems/projects/2295cb26a0/models/46f44d5e4e

note @adamhathcock is making a fix for this on the sdk side to register converters based on the full type name. This was previously resulting in wrong exceptions, eg in this case the Civil Entity converter was successfully registered even though it shouldn't have been, because the inherited base type name (Entity) exists in both civil and autocad namespaces

[linear]

CNX-988 Cogo Points not converted

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 9.17%. Comparing base (94104c2) to head (2d0a2f0).
Report is 1 commits behind head on dev.

Additional details and impacted files

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  Coverage   9.17%   9.17%           
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  Files        228     228           
  Lines       4295    4295           
  Branches     542     542           
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  Hits         394     394           
  Misses      3885    3885           
  Partials      16      16           

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[adamhathcock]

Related: #475