REVIT-222393 Fix Roof.Points throwing exception

[AdrianaStanica]

Purpose

Added a wrapper over Revit RoofBase class because "All elements of Category" node returned elements of type UnknownElement when filtering by Roof category because of this missing wrapper, causing the Roof.Points node to throw an exception because it expects a Roof object, not an UnknownElement object

Declarations

Check these if you believe they are true

• [x] The code base is in a better state after this PR
• [x] Is documented according to the standards
• [x] The level of testing this PR includes is appropriate
• [x] User facing strings, if any, are extracted into *.resx files
• [x] Snapshot of UI changes, if any.

Reviewers

@Mikhinja