Testing mapeo core in electron and react-native across versions and platforms

To improve maintainability of this package and the mapeo apps it would be useful to have e2e tests for mapeo-core that run in both react-native and electron as part of this repo. These tests could run against react-native supported versions on android and eventually ios and electron stable/beta/alpha releases on macos, windows, and linux.

react-native

We might be able to use react-native-test-app

electron

There doesn't seem to be an electron equivalent of react-native-test-app.
Instead we might use playwright's experimental electron support and run tests across desktop platforms using github actions.
I asked in the electron discord if there are other approaches to doing this so we'll see if that turns up anything: https://discord.com/channels/745037351163527189/1041773754419785800

No repository files or existing tests are named. Start by reviewing react-native-test-app, Playwright's experimental Electron support, and the linked React Native and Electron release guidance; done means e2e tests for mapeo-core run in React Native and Electron across the proposed supported versions and platforms through this repository.