Add Line of Sight calculator

Enhancement idea:  could Nick Hansen's Imperial Assault Line of Sight calculator be re-applied/added to https://sadgit-hl.github.io/D2eMap ? Two versions of Line of Site could be calculated: one with Descent LOS rules, the other with IA rules. I would be willing to help with this. See here for the IA LOS tool:  https://nick-hansen.github.io/ia-los/