migration onto 3.1.0 and including new example

StickerInfoBot/StickerInfoBotLib/src/jsMain/resources/index.html

@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Resender bot</title>
+</head>
+<body>
+    <form id="bot_token_form">
+        <input type="text" id="bot_token">
+        <input type="submit" value="Start bot">
+    </form>
+    <div id="start_offer">Type your bot token to the input above to start its work</div>
+    <script type="text/javascript" src="StickerInfoBotLib.js"></script>
+    <div id="bots_container"></div>
+</body>
+</html>