update tgbotapi and add webapps example

WebApp/src/jsMain/resources/index.html

@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="UTF-8">
+        <title>Web App Example</title>
+    </head>
+    <body>
+        <script type="application/javascript" src="https://telegram.org/js/telegram-web-app.js"></script>
+        <script type="application/javascript" src="WebApp.js"></script>
+    </body>
+</html>