fix(guide): simplify directory structure

guide/english/javascript/naming-convention-for-javascript/index.md

@@ -0,0 +1,22 @@
+---
+title: Naming Convention for JavaScript
+---
+Here you will get an overview of the different code cases that are widely used.
+
+## camelCase
+
+In programming, camelCase formatting for variable names looks like this:
+
+    var camelCase = "lower-case first word, capitalize each subsequent word";
+
+## PascalCase
+
+PascalCase (or CamelCase) is a variant of camelCase. It differs from camelCase by capitalizing every word, *including* the first word:
+
+    var PascalCase = "upper-case every word";
+
+## snake_case
+
+Another popular case called snake_case separates each word with underscores in this manner:
+
+    var snake_case = "lower-case everything, but separate words with underscores";