Profile and refactor polygon Boolean

[yungyuc]

modmesh::detail::compute_boolean_with_decomposition() (in polygon.hpp:2847) has potential performance hotspots of creating lambda closure find_crossing() in nested tight loops. It is also too long (300+ lines).

Profile to confirm or falsify performance concerns. Significant mockup data need to be created for meaningful profiling.

The helper function also overuses lambdas. The helper function (compute_boolean_with_decomposition()) should be refactored to a helper class, moved to standalone files (outside polygon.hpp), and all lambdas should be turned into member functions.

This issue is to track the work mentioned in #693 (comment).

[yungyuc]

@tigercosmos Please make a list for remaining work.

[tigercosmos]

Update: refactoring part is finished. We will work on the profiling part when there are performance issues.