feat: Event messages (#3345)

* feat: add createCallLink function

* feat: create Event class

* feat: add functionality for sending Events

* feat: add editEvent function

* refactor: send event location prop as wa does

* refactor: combine modules

* feat: add sendResponseToEvent function

* fix: createEventCallLink parameter

* docs: add documentation

* fix: eslint

* refactor: change timestamp to Date for the user's convenience

* refactor: rename 'Event' to 'ScheduledEvent' for more clarity

* style: fix typo in inner function

* refactor: remove unnecessary inner function

* refactor: rename 'sendResponseToEvent' to 'sendResponseToScheduledEvent' for more clarity

* fix: update the module name

index.js

@@ -20,6 +20,7 @@ module.exports = {
     ClientInfo: require('./src/structures/ClientInfo'),
     Location: require('./src/structures/Location'),
     Poll: require('./src/structures/Poll'),
+    ScheduledEvent: require('./src/structures/ScheduledEvent'),
     ProductMetadata: require('./src/structures/ProductMetadata'),
     List: require('./src/structures/List'),
     Buttons: require('./src/structures/Buttons'),