Add :editor objed module

Integrates `objed` with Doom Emacs to provide text-object manipulation
for non-evil users.

See https://github.com/clemera/objed

init.example.el

@@ -49,6 +49,7 @@
        ;;(format +onsave)  ; automated prettiness
        ;;lispy             ; vim for lisp, for people who dont like vim
        multiple-cursors  ; editing in many places at once
+       ;;objed             ; text object editing for the innocent
        ;;parinfer          ; turn lisp into python, sort of
        rotate-text       ; cycle region at point between text candidates
        snippets          ; my elves. They type so I don't have to