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.number.range.js

@@ -0,0 +1,12 @@
+'use strict';
+var $ = require('../internals/export');
+var NumericRangeIterator = require('../internals/numeric-range-iterator');
+
+// `Number.range` method
+// https://github.com/tc39/proposal-Number.range
+// TODO: Remove from `core-js@4`
+$({ target: 'Number', stat: true, forced: true }, {
+  range: function range(start, end, option) {
+    return new NumericRangeIterator(start, end, option, 'number', 0, 1);
+  }
+});