I’m going to make a mildly stronger claim. I think this game really is quite moddable by a non-coder. What you need is to implement a different ruleset with new win conditions; everything else can be done with copying existing files into the correct file structure. New win conditions are specified by a pretty boring JSON file, docs here:

github.com/…/5-Miscellaneous-JSON-files.md#victor…

See here for an MVP for a mod of this type (probably replaces/strips away too much, but you should be able to find the vanilla files in the github linked in the OP):

github.com/yairm210/…/master

Which is all to say, this is much easier than doing address lookup imo.