Add :editor word-wrap module

Defines a new minor-mode `+word-wrap-mode` which configures
adaptive-wrap-prefix-mode and visual-line-mode for smart soft-wrapping
of code.

Evil users can toggle it with `SPC t w`.

Enable globally with `+global-word-wrap-mode`.

See the README for more details!

init.example.el

@@ -54,6 +54,7 @@
        ;;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
+       ;;word-wrap         ; soft wrapping with language-aware indent
 
        :emacs
        dired             ; making dired pretty [functional]