replace helm for ivy

After experiencing these three packages, I liked helm, but to be honest,
I wasn't using all of its features and I was looking for a lighter and faster solution.
That's why, it's already a few years since I chose ivy and which corresponds entirely to my workflow.
Please note that my choice may vary according to your criteria 😊

init.el

@@ -96,7 +96,7 @@
   (require 'init-apache)
   (require 'init-company)
   (require 'init-flycheck)
-  (require 'init-helm)
+  (require 'init-ivy)
   (require 'init-log4j)
   (require 'init-whitespace)
   (require 'init-emmet-mode)