move `window.open` (or `window`) out of find

- so find does not open itself the window, but the app requesting it does
- so a resulting find query also advices for an `action` to take, usually `open`, but there is `display`, `exec` already defined etc.
- so browser/node.js have better compatibility (tests and cli usages)
- so find does not need an `init`, but the context can call it and feed it with a search from a query param it does not know about?
- so find "needs" nothing from its context, but can gather, and be fed, information