Not possible to make a tool currently. There is no standard way to program AIs, so everyone pretty much does it their own way. If you want to do anything besides a mirror matchup, for example ZvT you can probably just copy one AIs Zerg.galaxy and include files, and the other AI's Terran.galaxy files and included files to a folder and use the launcher with that. But thats not guaranteed to work. If an AI modifies the meleeAI.galaxy file, it probably wouldn't work.
I'm flattered, although tbh that version is very rudimentary.