This patch:
- introduces non-exported but used in api/impl struct types (e.g. Point);
- makes all client classes implement respective public api interface.
Pros:
- Typescript is now responsible for type checking.
We can remove our doclint checker (not removed yet).
- Electron and Android types can be defined in the same way
(this is not implemented yet).
- We can move most of the type structs like Point to the public api
and make some of them available.
Cons:
- Any cons?
- This leaves just `recordVideos` and `videoSize` options on the context.
- Videos are saved to `artifactsPath`. We also save their ids to trace.
- `context.close()` waits for the processed videos.
