Add rotate convenience function and comprehensive polygon rotation documentation#336

Copilot wants to merge 2 commits intomainJuliaGeo/GeometryOps.jl:mainfrom

copilot/fix-00952ad6-e47f-4f19-b7ef-03f6f7471342JuliaGeo/GeometryOps.jl:copilot/fix-00952ad6-e47f-4f19-b7ef-03f6f7471342Copy head branch name to clipboard