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

website/playground/new-samples/extending-language-services/hover-provider-example/sample.js

@@ -0,0 +1,50 @@
+
+monaco.languages.register({ id: 'mySpecialLanguage' });
+
+monaco.languages.registerHoverProvider('mySpecialLanguage', {
+	provideHover: function(model, position) {
+		return xhr('../playground.html').then(function(res) {
+			return {
+				range: new monaco.Range(1, 1, model.getLineCount(), model.getLineMaxColumn(model.getLineCount())),
+				contents: [
+					'**SOURCE**',
+					{ language: 'html', value: res.responseText.substring(0, 200) }
+				]
+			}
+		});
+	}
+});
+
+monaco.editor.create(document.getElementById("container"), {
+	value: '\n\nHover over this text',
+	language: 'mySpecialLanguage'
+});
+
+function xhr(url) {
+	var req = null;
+	return new monaco.Promise(function(c,e,p) {
+		req = new XMLHttpRequest();
+		req.onreadystatechange = function () {
+			if (req._canceled) { return; }
+
+			if (req.readyState === 4) {
+				if ((req.status >= 200 && req.status < 300) || req.status === 1223) {
+					c(req);
+				} else {
+					e(req);
+				}
+				req.onreadystatechange = function () { };
+			} else {
+				p(req);
+			}
+		};
+
+		req.open("GET", url, true );
+		req.responseType = "";
+
+		req.send(null);
+	}, function () {
+		req._canceled = true;
+		req.abort();
+	});
+}