method Keyboard.webAppimport { Keyboard } from "https://deno.land/x/grammy@v1.21.1/convenience/keyboard.ts"; webApp(text: string, url: string): KeyboardButton.WebAppButtonCreates a new web app button. The Web App that will be launched when the user presses the button. The Web App will be able to send a “web_app_data” service message. Available in private chats only. Parameterstext: stringThe text to display url: stringAn HTTPS URL of a Web App to be opened with additional data ReturnsKeyboardButton.WebAppButton