[relate] support ccw and open geometries, use closeable_view and reversable_view if needed
[relate] implement the check for boundaries of Areal equal to Linear geometries in L/A
[relate] implement proper handling of multiple rings while checing for equality with the linestrings, enable relate() for all ls- and poly-based geometries
[relate] add test for Areal boundary equal to more than one Ls in MLs forming a linear ring
[relate] group_dim util moved to separate file
[relate][get_turns] fixed (GCC) compilation errors (missing include, typename keyword, shadowing of template parameters)
Merge branch 'feature/relate' of https://github.com/boostorg/geometry into feature/relate