Deleted change log, added readme metadata, extended target completion date

Author: HeidiSteen

CHANGELOG.md

@@ -1,5 +1,16 @@
+---
+topic: sample
+services: azure-search
+languages:
+  - javascript
+name: Azure Search Sample Data
+description: |
+  Find JavaScript samples for Azure Search in this repo.
+products:
+  - azure-search
+---
 # Azure Search JavaScript Samples repository
 
 This repository contains JavaScript sample code used in Azure Search quickstarts, tutorials, and examples.
 
-We are currently in the process of migrating content to this repository. Target completion date for this work is mid-April.
+We are currently in the process of migrating content to this repository. Target completion date for this work is end of April.