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/es.symbol.async-dispose.js

@@ -0,0 +1,21 @@
+'use strict';
+var globalThis = require('../internals/global-this');
+var defineWellKnownSymbol = require('../internals/well-known-symbol-define');
+var defineProperty = require('../internals/object-define-property').f;
+var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;
+
+var Symbol = globalThis.Symbol;
+
+// `Symbol.asyncDispose` well-known symbol
+// https://github.com/tc39/proposal-async-explicit-resource-management
+defineWellKnownSymbol('asyncDispose');
+
+if (Symbol) {
+  var descriptor = getOwnPropertyDescriptor(Symbol, 'asyncDispose');
+  // workaround of NodeJS 20.4 bug
+  // https://github.com/nodejs/node/issues/48699
+  // and incorrect descriptor from some transpilers and userland helpers
+  if (descriptor.enumerable && descriptor.configurable && descriptor.writable) {
+    defineProperty(Symbol, 'asyncDispose', { value: descriptor.value, enumerable: false, configurable: false, writable: false });
+  }
+}