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

src/util/Injected/Store.js

@@ -114,6 +114,11 @@ exports.ExposeStore = () => {
     window.Store.ForwardUtils = {
         ...window.require('WAWebChatForwardMessage')
     };
+    window.Store.ScheduledEventMsgUtils = {
+        ...window.require('WAWebGenerateEventCallLink'),
+        ...window.require('WAWebSendEventEditMsgAction'),
+        ...window.require('WAWebSendEventResponseMsgAction')
+    };
     window.Store.VCard = {
         ...window.require('WAWebFrontendVcardUtils'),
         ...window.require('WAWebVcardParsingUtils'),