Docs: Add Table of Contents to "Getting Started" directory

Author: janiceilene

docs/getting-started/README.md

@@ -0,0 +1,10 @@
+# Getting Started
+
+1. [Quick Start](1-quick-start.md)
+2. [JavaScript and Gulpfiles](2-javascript-and-gulpfiles.md)
+3. [Creating Tasks](3-creating-tasks.md)
+4. [Async Completion](4-async-completion.md)
+5. [Working with Files](5-working-with-files.md)
+6. [Explaining Globs](6-explaining-globs.md)
+7. [Using Plugins](7-using-plugins.md)
+8. [Watching Files](8-watching-files.md)