Extract playground samples from mdoc, add possiblity to run them from source

website/playground/new-samples/extending-language-services/configure-javascript-defaults/sample.html

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+<div id="container" style="height:100%;"></div>

website/playground/new-samples/extending-language-services/configure-javascript-defaults/sample.js

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+// Add additonal d.ts files to the JavaScript language service and change.
+// Also change the default compilation options.
+// The sample below shows how a class Facts is declared and introduced
+// to the system and how the compiler is told to use ES6 (target=2).
+
+// validation settings
+monaco.languages.typescript.javascriptDefaults.setDiagnosticsOptions({
+	noSemanticValidation: true,
+	noSyntaxValidation: false
+});
+
+// compiler options
+monaco.languages.typescript.javascriptDefaults.setCompilerOptions({
+	target: monaco.languages.typescript.ScriptTarget.ES6,
+	allowNonTsExtensions: true
+});
+
+// extra libraries
+monaco.languages.typescript.javascriptDefaults.addExtraLib([
+	'declare class Facts {',
+	'    /**',
+	'     * Returns the next fact',
+	'     */',
+	'    static next():string',
+	'}',
+].join('\n'), 'filename/facts.d.ts');
+
+var jsCode = [
+	'"use strict";',
+	'',
+	"class Chuck {",
+	"    greet() {",
+	"        return Facts.next();",
+	"    }",
+	"}"
+].join('\n');
+
+monaco.editor.create(document.getElementById("container"), {
+	value: jsCode,
+	language: "javascript"
+});