fix(darwin): exclude fsevents from electron-rebuild and install scripts
fsevents v1.x (optional dep of chokidar v2) uses NAN which calls v8::Object::GetIsolate(), removed in Electron 41+ v8 headers. This caused the Darwin CI build to fail with a compile error in fsevents.cc. fsevents is not used at runtime by Daedalus (not in runtime-nodejs-deps.json, not imported in any source file), so it is safe to skip compilation entirely.