Extract methods

[Eneroth3]

SolidOperations has become a very large class, with a lot of private methods that can be extracted to a library, such as Eneroth3/sketchup-community-lib.

Remember to re-enable RuboCop Metrics/ModuleLength if extracting these methods.

Methods already in cmty-lib:

• definition
• instance?
• transform_as_normal
• transpose
• wrapping_face

Methods that could be added to cmty-lib:

• uniq_points -> LGeom.purge_duplicates (or perhaps LArray.uniq_equals)
• within_face? -> LFace -> point_within?
• point_at_face -> LFace.arbitrary_point_within

Methods that could be moved to a SelectEntities class, specific to solid operations:

These are a bit too specific to this implementation to fit into the API of a public library.

• find_faces
• find_corresponding_faces
• find_coplanar_edges
• naked_edges
• find_mesh_geometry

purge redundant find_-prefix if doing so

[Eneroth3]

Methods already in cmty-lib:

• icon_file_extension

[Eneroth3]

Started extract-methods branch.