* feat(overlay): add current time * feat(overlay): add customization options * fix(overlay): use local time zone * fix(overlay): enable by default * feat(overlay): add position modification
* refactor(globals): use macro's for to_json/from_json * refactor(globals): switch from global pointer to global instance
Closes #587
Co-authored-by: tupoy-ya <tupoy-ya@users.noreply.github.com>