FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/core-js/modules/esnext.array.is-template-object.js

@@ -0,0 +1,29 @@
+'use strict';
+var $ = require('../internals/export');
+var isArray = require('../internals/is-array');
+
+// eslint-disable-next-line es/no-object-isfrozen -- safe
+var isFrozen = Object.isFrozen;
+
+var isFrozenStringArray = function (array, allowUndefined) {
+  if (!isFrozen || !isArray(array) || !isFrozen(array)) return false;
+  var index = 0;
+  var length = array.length;
+  var element;
+  while (index < length) {
+    element = array[index++];
+    if (!(typeof element == 'string' || (allowUndefined && element === undefined))) {
+      return false;
+    }
+  } return length !== 0;
+};
+
+// `Array.isTemplateObject` method
+// https://github.com/tc39/proposal-array-is-template-object
+$({ target: 'Array', stat: true, sham: true, forced: true }, {
+  isTemplateObject: function isTemplateObject(value) {
+    if (!isFrozenStringArray(value, true)) return false;
+    var raw = value.raw;
+    return raw.length === value.length && isFrozenStringArray(raw, false);
+  }
+});