Update code-description.md

Author: hubwriter

code-description.md

@@ -13,12 +13,24 @@ The code is written in TypeScript. This file describes how the code works.
   - [Version nesting](#version-nesting)
 - [How the code works](#how-the-code-works)
   - [1. Parsing the Markdown file](#1-parsing-the-markdown-file)
+    - [Processing each version tag]()
+    - [Example]()
+    - [Results of parsing]()
   - [2. Highlighting tags and displaying a versioning message](#2-highlighting-tags-and-displaying-a-versioning-message)
+    - [Highlighting the relevant version tags]()
+    - [Removing the highlighting]()
+    - [Displaying a versioning message]()
 - [Reference](#reference)
   - [Variables and constants in alphabetical order](#variables-and-constants-in-alphabetical-order)
   - [Tag object properties](#tag-object-properties)
   - [Per-tag explanation](#per-tag-explanation)
+    - [All tags]()
+    - [``]()
+    - [``]()
+    - [``]()
+    - [``]()
   - [Regular expression](#regular-expression)
+  - [The package.json file](#the-packagejson-file)
 <br/>
 
 ## Terminology