Restructuring of scripts for better use of ES6 concepts

- Optimized use of common properties (, , ...)
- Dispatching events in an attempt to de-globalize certain variables used in the past
- Attempt to organize files in a more logical manner

assets/scripts/utils/environment.js

@@ -0,0 +1,6 @@
+const $document = $(document);
+const $window = $(window);
+const $html = $(document.documentElement);
+const $body = $(document.body);
+
+export { $document, $window, $html, $body };