refactor: replace PCC*3T typedefs with Vec3<T>
This is part of a series attempting to remove unhelpful typedefs. The old typedefs (PCCVector3D, PCCPoint3D, PCCColor3B) are retained for compatibility, but marked as deprecated.
This is part of a series attempting to remove unhelpful typedefs. The old typedefs (PCCVector3D, PCCPoint3D, PCCColor3B) are retained for compatibility, but marked as deprecated.