Enable annotations (drawing on the map)

The annotations plugin is already added to the project but has not been activated.
https://github.com/acidflow-noita/noitamap/blob/00df67642be2ec6a1cdd6de53077da639659c450/public/js/script.js#L857-L859

Current issues are:

- [ ] The pugin puts its controls at the very bottom left of the map container making it almost impossible to use.
- [ ] There are no means of sharing an annotation (similar to copying current `zoom` level and `coordinates` to the clipboard).