destack.json

- oh what is the theoretically ideally package format? toml? json? txt? CMakeLists? magic setup.py? just kidding
- package.json is okay, let's just use that -> destack.json
- json based, json is nice, let's use use that
- familiar mental model, just combine the disparate pieces
- combine electron, expo, package.json, Cargo.toml, ...