Add `isEnabled` to index.d.ts (#7316)
Add `isEnabled` to index.d.ts (#7316)

- Add missing declaration for function `isEnabled`.

Co-authored-by: Gusted <d02dbed052e28c2380acdd37568fd76142823678@hotmail.com>
darkreader/darkreader,alexanderby/darkreader,alexanderby/darkreader,darkreader/darkreader,alexanderby/darkreader,darkreader/darkreader