Update for Azure SQL Hybrid Cloud Toolkit (#13360)

* Added azurehybridtoolkit to list of external extensions

* Added updated book

* added to recommended extensions

* extensions.js updated for build

* added small changes to extension

* small changes to extension

* tsconfig change

* gitignore and vscode changes

* changed package display name

extensions/azurehybridtoolkit/tsconfig.json

@@ -1,8 +1,8 @@
 {
+	"extends": "../shared.tsconfig.json",
 	"compileOnSave": true,
 	"compilerOptions": {
 		"module": "commonjs",
-		"target": "es6",
 		"outDir": "./out",
 		"lib": [
 			"es6", "es2015.promise"